Smartwatches / Compare

OnePlus Watch 3 vs Samsung Galaxy Watch FE

A

Product A: OnePlus

Watch 3

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B

Product B: Samsung

Galaxy Watch FE

88 of 150 known

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Every value links to where we found it.

Only differences

AOnePlus Watch 3

BSamsung Galaxy Watch FE

General

6 of 10 differ

Series

Watch1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Galaxy Watch1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Product name Galaxy Watch FE in the Samsung Galaxy Watch line.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

OPWWE2511Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Original large OnePlus Watch 3 OPWWE251. The separately marketed 43 mm OPWE242 is excluded.7Maker product pageoneplus.com/uk/pstisocRead 8 October 2026Public list explicitly distinguishes OnePlus Watch3 OPWWE251 from OnePlus Watch3 43 mm OPWE242. PSTI security support is not an OS-update-years promise.

SM-R861, SM-R8665Press articlesammobile.com/news/galaxy-watch-fe-bluetooth-sigRead 13 October 2026The listing names SM-R861, SM-R866F, SM-R866N and SM-R866U. SM-R866F is the international LTE model, SM-R866N is for South Korea and SM-R866U is for the US. SM-R866 is stored for the LTE family.

GTIN / EAN

Not available

Not available

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

18 February 20253Press releaseoneplus.com/us/press/press-release/oneplus-unveils-its-latest-flagship-smartwatch-oneplus-watch-3Read 8 October 2026

13 June 20242Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Samsung Global Newsroom release of 13 June 2024.

Status

Not available

Not available

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

OnePlus Watch 411Reviewnotebookcheck.net/OnePlus-Watch-4-New-Wear-OS-smartwatch-detailed-before-global-release.1275026.0.htmlRead 23 October 2026Notebookcheck's preview says the OnePlus Watch 4 is replacing the OnePlus Watch 3.

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

Not available

$199.996Press articletomsguide.com/wellness/smartwatches/samsung-galaxy-watch-feRead 13 October 2026Bluetooth model $199.99 from 24 June 2024. LTE model $249.99, arriving later in the year. Android Central reports the same prices. US prices exclude sales tax.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

€2197Press articlegiga.de/news/samsung-lueftet-das-geheimnis-neue-galaxy-watch-ist-offiziellRead 13 October 2026Launch article of 14 June 2024: Bluetooth 219 EUR and Bluetooth + LTE 269 EUR. German consumer prices with VAT.

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

GB1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026UK reference page, including its ECG-capable sensor table. North American ECG app eligibility is not inherited.

Not available

ColoursiThe maker's own colour names

Obsidian Titanium1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Obsidian Titanium reference. The titanium wording describes the bezel, not an all-titanium housing.

Black, Pink Gold, Silver2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Black, Pink Gold and Silver. Colour availability varies by market.

Segment

Smartwatch1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Smartwatch2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Presented as a new addition to the Samsung smartwatch lineup.

OS updates promisediYears of explicitly promised OS updates. A security-only support period does not establish an OS-upgrade promise.

Not available

Not available

Security updates untiliExact end date published for security-update support of this model. Do not calculate it from a stated number of years. A security-only period does not promise OS upgrades.

Not available

Not available

Case

7 of 8 differ

Case sizeiMarketed case-size options. The marketed size can differ from physical case height, such as ceramic editions. Base dimensions describe the smallest base-material case.

Not available

40mm2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Available in a size of 40 mm.

Case shape

Round1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Round1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Round case and round 396 x 396 display on the product images and user guide.

Case materialiMaterial of the housing body, not just the bezel. Use Mixed when the maker describes a mixture of housing/frame materials. Read the published-material field for the parts and proportions.

Stainless steel1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Aluminium2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Aluminum case.

Case material (as published)

Black stainless steel case with black titanium bezel1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Aluminum case2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Aluminum case. Retailers call it Armor Aluminum, which Samsung does not state here.

BackiMaterial of the back of the smallest base-material case. Other materials or regional editions can differ. See source notes.

Plastic5Spec databasephonearena.com/phones/OnePlus-Watch-3_id12649Read 8 October 2026Design > Materials explicitly distinguishes Plastic back and Stainless-steel frame.

Not available

Case dimensionsiPhysical case height, width and thickness. The source note states exclusions such as the heart-rate sensor protrusion.

Thickness11.75mm1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Maker publishes 46.6 mm excluding lugs x 47.6 mm x 11.75 mm excluding the sensor area. Height/width axes are not labelled, and secondary lists reverse their order. Only unambiguous thickness is stored.

Height39.3Width40.4Thickness9.8mm(1.5 × 1.6 × 0.4 in)1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Body Dimension (HxWxD, mm) 39.3 x 40.4 x 9.8. The global release footnote says measured without health sensors.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: 39.3 x 40.4 x 9.8mm, footnote 18 measured without health sensors.

Weight (case only)iWatch body without a strap. An unqualified published weight must not be assumed to exclude the strap.

49.7g(1.8 oz)1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Size and Weight: 49.7 g excluding wrist strap.

26.6g(0.9 oz)1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Body Weight 26.6 g. The global release footnote says measured without band. The US launch release table lists 25.9 g, which the global release and Samsung spec pages contradict.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: 26.6g, footnote 19 measured without band.

Weight with strapiWatch with the stated strap attached. Strap material and case size belong in the source note. Reviewer measurements belong in measured fields.

81g(2.9 oz)1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Size and Weight: 81 g including the supplied wrist strap.

Not available

Durability

1 of 8 differ

Water resistanceiStatic water-pressure rating in atmospheres. It is not a safe swimming or diving depth. Diving limits are listed separately.

5ATM1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

5ATM1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Durability 5 ATM.

Water resistance standard

ISO 22810:20103Press releaseoneplus.com/us/press/press-release/oneplus-unveils-its-latest-flagship-smartwatch-oneplus-watch-3Read 8 October 20265 ATM under ISO 22810:2010. Not suitable for diving/hot showers/sauna. No dive depth is inferred.

ISO 22810:20104Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Maintaining water and dust resistance: 5ATM tested by submerging in 50 m of fresh water for 10 minutes to meet ISO 22810:2010. IPX8 at 1.5 m for 30 minutes and IP6X under IEC 60529.

Dust and water rating

IP681Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

IP682Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table lists IP68. Footnote 23: IP68 against dust and fresh water to a maximum of 1.5 meters for up to 30 minutes. The user guide words it as IPX8 and IP6X.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026The guide states IPX8 and IP6X. The release table states IP68, which is the stored value.

Dive rating

Not available

Not available

Max dive depthiMaker-rated depth for the stated diving use, not a conversion from the water-resistance pressure rating.

Not available

Not available

MIL-STD-810iMaker claim that the watch was tested against specified MIL-STD-810 methods. It is not a guarantee for every military-standard test.

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Yes2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Durability 5ATM + IP68 / MIL-STD-810H. The US launch release table says MIL-STD-810G. Both mean a MIL-STD-810 claim. Samsung publishes no test list.

MIL-STD-810 tests

Low pressure (altitude), High temperature, Low temperature, Temperature shock, Solar radiation, Rain, Humidity and heat, Salt spray, Sand and dust, Immersion, Vibration, Impact, Temperature-humidity-altitude, Fluid contamination, Acidic atmosphere, Ice accumulation and freezing rain1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Maker named MIL-STD-810H test list. The 70 C/-40 C durability tests are not operating-temperature limits.

Not available

Operating temperatureiPublished operating range. Source notes identify on-wrist limits and other operating conditions. Storage or charging limits are excluded.

Min0Max35°C2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026NFC Description, printed page 4, instructs use within 0-35 C. Military thermal test extremes and VOOC charging battery-temperature limits are separate.

Min0Max35°C4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Health and Safety: the device can be used at an ambient temperature of 0 to 35 C. Storage is -20 to 50 C.

Display

6 of 14 differ

Display type

LTPO OLED1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

OLED1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 20262Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Super AMOLED.

Display type (as published)

LTPO AMOLED1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Super AMOLED1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Super AMOLED.

Screen sizeiPublished active display diagonal for a rectangular display, or diameter for a round display. Do not calculate it from pixels or display area.

1.5in(3.8 cm)1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

1.2in(3 cm)2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: 1.2-inch, 396x396, Super AMOLED, Full Color Always On Display. The India page lists the main display as 3.04 cm.

Resolution

466 × 466px1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

396 × 396px1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: 396 x 396. Colour depth 16M.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: 396x396.

Pixel densityiPublished pixel density. A rectangular diagonal formula must not be applied to a round display.

Not available

Not available

Display area

Not available

Not available

Touchscreen

Yes4Reviewandroidcentral.com/wearables/oneplus-watch-3-reviewRead 8 October 2026

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026The screen supports tapping and the Home screen is controlled by touch.

Max refresh rateiHighest published display refresh rate in active operation.

Not available

Not available

Min refresh rateiLowest published display refresh rate, usually in always-on mode. It is not the active-use minimum unless stated.

Not available

Not available

Peak brightnessiMaker peak-brightness claim. It may apply to a small area or bright ambient light. Full-screen limits and battery/temperature conditions belong in source notes.

2,200nits1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Published peak up to 2200 nits, not a measured full-screen value.

Not available

Minimum brightness

Not available

Not available

Always-on display

Yes4Reviewandroidcentral.com/wearables/oneplus-watch-3-reviewRead 8 October 2026

Yes2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Full Color Always On Display.

Display cover

Sapphire1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Sapphire1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Display cover (as published)

Sapphire crystal1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Sapphire Crystal glass1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page: Sapphire crystal glass withstands scratches and drops.

Platform

12 of 15 differ

Platform

Wear OS1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Wear OS1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 20262Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: OS Wear OS Powered by Samsung.

OS at launch

Wear OS 5 and RTOS3Press releaseoneplus.com/us/press/press-release/oneplus-unveils-its-latest-flagship-smartwatch-oneplus-watch-3Read 8 October 2026

Wear OS 48Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: Wear OS 4. The Mezha review says Wear OS 4 with One UI 5 Watch.

Software

Not available

One UI 5 Watch2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: UI One UI 5 Watch.

Latest OS

Not available

Wear OS 6 (One UI 8 Watch)8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: upgradable to Wear OS 6.0 with One UI Watch 8. A spec database claim. The date of access dates it.

Works with

Android2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026

Android2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table lists Android phones only.

Phone requirement

Android 9.0 or later with Google Mobile Services 23.45.23 or later and OHealth. iOS and Android Go are not supported.2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026

Android 11.0 or higher with more than 1.5 GB of memory. The phone needs Google Mobile Services. Not compatible with Android Go edition.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Android 11.0 or higher and with more than 1.5GB of memory. Footnote 21: works with phones running the latest Android, excluding Go edition and phones without Google Play Store. Footnote 24: activation needs a phone that supports Google Mobile Services.

App store

Yes6Maker product pageoneplus.com/global/oneplus-watch-3Read 8 October 2026Google Play store supports downloading applications. Wear OS applications are restricted in RTOS Power Saver mode.

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Play Store app on the watch, with a Google Account registered.

Voice assistants

Google Assistant2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026Buttons and Touch, printed page 2, names Google Assistant as the default crown-hold action. Smart mode, Google account, supported region/language and internet through phone/Wi-Fi are required. No RTOS Power Saver or unverified Gemini availability is promised.10Reviewthe-gadgeteer.com/2025/03/16/oneplus-watch-3-review-a-solid-big-smartwatch-with-battery-for-literal-daysRead 8 October 2026Exact original model review actually uses Google Assistant by crown hold. Its erroneous iOS OHealth claim and partial daily charging observations are not imported. Current maker manual and Google support retain region/account/connectivity conditions.

Bixby2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Footnote 21 describes Wear OS Powered by Samsung. The user guide names Bixby as the voice assistant on the Home button.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Press and hold the Home button to start Bixby.

Chipset

Qualcomm Snapdragon W51Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Main processor Snapdragon W5. Its process is distinct from the BES2800 MCU process.

Exynos W9202Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Exynos W920 Dual Core 1.18GHz.

Process

4nm5Spec databasephonearena.com/phones/OnePlus-Watch-3_id12649Read 8 October 2026Hardware > Snapdragon W5 Gen1 (4 nm), main application SoC. The maker 6 nm figure describes the separate BES2800 MCU and is not substituted here.

5nm8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: Exynos W920 (5 nm).9Maker product pagesemiconductor.samsung.com/processor/wearable-processor/exynos-w920Read 13 October 2026Exynos W920 is built on the 5nm EUV process.

CPU cores

45Spec databasephonearena.com/phones/OnePlus-Watch-3_id12649Read 8 October 2026

29Maker product pagesemiconductor.samsung.com/processor/wearable-processor/exynos-w920Read 13 October 2026Dual-core Arm Cortex-A55 CPU.

CPU configuration

AOnePlus Watch 3

Count	Core	Max clock (GHz)
4	Cortex-A53	1.7

Source5Spec databasephonearena.com/phones/OnePlus-Watch-3_id12649Read 8 October 2026Hardware explicitly gives quad-core 1.7 GHz Cortex-A53.

BSamsung Galaxy Watch FE

Count	Core	Max clock (GHz)
2	Cortex-A55	1.18

Source8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: dual-core 1.18 GHz Cortex-A55. Matches the Samsung release spec table of 1.18GHz dual core.9Maker product pagesemiconductor.samsung.com/processor/wearable-processor/exynos-w920Read 13 October 2026Dual-core Arm Cortex-A55 CPU running at up to 1.18GHz. The page says it is no longer available as of 31 July 2025.

Max CPU clock

1.7GHz=CalculatedFrom CPU configuration

1.18GHz=CalculatedFrom CPU configuration

GPU

Adreno 7025Spec databasephonearena.com/phones/OnePlus-Watch-3_id12649Read 8 October 2026

Arm Mali-G688Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: Mali-G68.9Maker product pagesemiconductor.samsung.com/processor/wearable-processor/exynos-w920Read 13 October 2026Arm Mali-G68 GPU.

Low-power coprocessor

BES2800BP1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Chip table explicitly names MCU BES2800BP. RTOS handles background/low-power tasks.

Not available

Memory

2 of 2 differ

RAMiKeep published GB values as stated. Convert a source explicitly labelled MB using 1000 MB per GB and preserve its original figure and unit in the note. Do not assume MB means MiB. Convert explicit MiB or GiB to decimal GB through their byte definitions, recording the conversion in the note. This normalization does not establish an exact physical byte count.

2GB4Reviewandroidcentral.com/wearables/oneplus-watch-3-reviewRead 8 October 2026Original large-model review spec table gives 2 GB RAM and 32 GB storage.

1.5GB1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Memory 1.5 GB.

StorageiTotal built-in storage the maker states, in decimal GB. Space available to the user is lower and goes in the source note. A figure the maker gives only as available space is not stored.

32GB1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

16GB1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Storage 16 GB, with 7.6 GB available to the user.

Health sensors

4 of 8 differ

Heart rate sensor

8-channel optical heart rate sensor2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026Performance Parameters, printed page 6: 8-channel optical heart-rate sensor, with a separate 16-channel optical pulse-oximeter sensor.

Samsung BioActive Sensor (Optical Heart Rate + Electrical Heart + Bioelectrical Impedance Analysis)1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications Sensors: Accelerometer, Barometer, Bioelectrical Impedance Analysis Sensor, Electrical Heart Sensor, Gyro Sensor, Geomagnetic Sensor, Light Sensor, Optical Heart Rate Sensor. The global release names them the Samsung BioActive Sensor.

ECG capabilityiElectrical heart sensing hardware with an ECG capability. The ECG app can require an eligible country, age and paired phone.

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026UK table explicitly lists ECG hardware and ECG Analyzer. App availability depends on country, phone, age and current software. This is not a claim of worldwide ECG-app availability.

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page text: if irregularities are detected the watch prompts a detailed ECG examination. Electrical Heart Sensor is listed. Availability of ECG varies by country.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Release: users can monitor ECG. ECG is only available in select markets.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Samsung Health Monitor section: Starting to measure ECG.

Blood oxygen sensingiBlood-oxygen sensing capability. App availability and medical status vary by market.

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Samsung Health, Blood oxygen: tap Measure to measure the blood oxygen level.

Skin temperature sensingiA sensor or supported function that measures skin temperature. It is not a core-body thermometer.

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

No11Reviewmezha.ua/en/reviews/galaxy-watch-fe-an-affordable-smartwatch-on-wear-osRead 13 October 2026Review: the difference from older Samsung smartwatches is the absence of a temperature sensor. Samsung's complete sensor list has no temperature sensor. GSMArena lists skin temperature, which the maker list does not support.

Blood pressure featureiPublished blood-pressure feature category. Hypertension notifications are not numerical blood-pressure readings.

Not available

Calibrated with a cuff2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Release: Blood Pressure feature only in select markets. Calibrate every four weeks with a traditional blood pressure cuff. It cannot diagnose hypertension. The US launch release does not name blood pressure.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Samsung Health Monitor section: calibrate and measure blood pressure. The guide names a blood pressure manometer for calibration.

Body composition sensor

Not available

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 20264Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Samsung Health Body composition section.

Skin conductance (EDA)

Not available

Not available

Medical clearancesiNamed regulatory clearances and their jurisdiction. General water resistance or an ECG sensor does not establish medical clearance.

Not available

Not available

Motion and environment sensors

0 of 9 differ

Accelerometer

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Barometric altimeter

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Compass

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026A Compass app is listed. The India page lists a geomagnetic sensor.

Ambient light sensor

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Depth gauge

Not available

Not available

Depth gauge rangeiPublished measurement range of the depth gauge, distinct from maximum diving depth and water-pressure resistance.

Not available

Not available

Water temperature sensor

Not available

Not available

Health and fitness

2 of 5 differ

Health featuresiSupported health functions with country, phone and subscription restrictions in the source notes. Upcoming functions are not counted as available.

Continuous heart rate, Heart rate alerts, ECG app, Blood oxygen app, Heart rate variability, Sleep tracking, Stress tracking1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Current maker health list: heart rate and high/low alerts, SpO2 spot/all-day checks, sleep quality/snoring-risk assessment, Mind and Body with HRV/stress and ECG Analyzer in eligible regions. Snoring-risk assessment is not sleep-apnea clearance.6Maker product pageoneplus.com/global/oneplus-watch-3Read 8 October 2026Published continuous heart rate and HRV/stress functions. Current UK ECG is independently specified. US ECG app availability is excluded.

Heart rate alerts, Irregular rhythm notifications, ECG app, Blood oxygen app, Sleep tracking, Sleep stages, Stress tracking, Cycle tracking, Body composition1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page: heart rate alerts for a heart rate that is too high or too low, an ECG prompt on irregularities, and body composition. Footnote: Irregular Heart Rhythm Notification availability varies by country.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Release: HR Alert, Irregular Heart Rhythm Notification in select markets, ECG and blood pressure in select markets, sleep features with sleep coaching, and Body Composition. All are general wellness features. Availability varies by market.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Sleep: four stages Awake, REM, Light and Deep. Also Stress, Cycle tracking, Heart rate alert and Body composition sections.

Fitness featuresiSupported workout functions. A sport-profile name alone does not prove advanced metrics such as running power or running dynamics. Trackback follows the recorded route back to the start. A compass arrow that points straight to the start does not count.

VO2 max, Running dynamics, Running power, Turn-by-turn navigation1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Professional Running explicitly names cadence, stride length, ground contact time/balance, vertical movement and running power. VO2 max and Google Maps turn directions are published on the linked product page. An over 100 claim is not an exact profile count.6Maker product pageoneplus.com/global/oneplus-watch-3Read 8 October 2026Running VO2max and ground contact data plus Google Maps turn directions. No direct running/sport profile count is inferred from 100+.

Automatic workout detection, Pool swim, Open water swim1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page: the watch automatically recognizes and logs running, walking and biking. Footnote: auto detect is available for certain workouts.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Exercise lists Pool swim and Open water swim. Auto detect workouts records exercise type, duration and calories automatically.

Sport profilesiPublished count of distinct sport/activity profiles. A claim such as 180+ is not an exact integer count.

Not available

Not available

Dive modesiActual supported dive modes. Water resistance or a depth app alone does not establish decompression-capable scuba support.

Not available

Not available

External sensorsiTypes of external workout sensors the watch can pair with. GPS reception, phone data and built-in sensors do not qualify.

Not available

Not available

Safety

2 of 6 differ

Fall detectioniAutomatic fall detection. Incident detection restricted to recorded workouts is not counted as general fall detection.

Not available

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page: Fall Detection sends an SOS when it detects a fall. Footnote: the Detect falls feature must be enabled in the Galaxy Wearable app.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Requesting an SOS when you are hurt from a fall: Hard fall detection is switched on in the Galaxy Wearable app.

Car crash detection

Not available

Not available

Emergency SOSiA manual emergency alert to emergency services or preset contacts. Source notes identify the recipient, paired-phone requirement and country limits. Satellite is listed separately.

Not available

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Sending an SOS: in an emergency press the Home button five times to make an emergency call and send an SOS message with the location. Needs set-up in the Galaxy Wearable app.

Emergency sireniPublished or measured siren sound level in decibels. Audible distance alone does not establish this value. Measurement distance belongs in source notes.

Not available

Not available

Live location sharingiShares live location during supported use. A paired phone or data subscription may be required.

Not available

Not available

Dedicated LED flashlightiA dedicated hardware LED flashlight. Lighting the display white is not counted.

Not available

Not available

Positioning

2 of 3 differ

PositioningiPublished satellite systems and signal bands. Do not infer bands from dual-frequency support alone.

GPS (L1 + L5), BeiDou, Galileo, GLONASS, QZSS1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Connectivity names GPS dual-band L1+L5 and BeiDou/Galileo/GLONASS/QZSS. Signal bands for the other constellations are not invented.

GPS, GLONASS, BeiDou, Galileo1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: GPS, Glonass, Beidou, Galileo. Signal bands are not published.

Dual-band GNSSiMaker-stated dual-frequency satellite reception. Supported constellations and signal bands are listed separately.

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Not available

Offline mapsiMap data stored on the watch and usable without live phone data. GPX routes or breadcrumb tracks alone are not offline maps.

Not available

Not available

Connectivity

6 of 15 differ

BluetoothiPublished Bluetooth support for this model. The version is recorded separately. Unknown version does not mean the radio is absent.

Not available

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications list a Bluetooth version and profiles.

Bluetooth version

5.21Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

5.31Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Bluetooth v5.3 with A2DP, AVRCP, HFP and HSP profiles. The US launch release table lists 5.0, which the global release, the Samsung spec pages and the Bluetooth SIG listing contradict.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Bluetooth 5.3.5Press articlesammobile.com/news/galaxy-watch-fe-bluetooth-sigRead 13 October 2026Bluetooth SIG listing reported on 4 June 2024: Bluetooth 5.3.

Wi-FiiPublished Wi-Fi support for this model. The standard and bands are recorded separately. Unknown standard does not mean Wi-Fi is absent.

Not available

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Wi-Fi standard

Wi-Fi 45Spec databasephonearena.com/phones/OnePlus-Watch-3_id12649Read 8 October 2026Connectivity explicitly lists 802.11 a/b/g/n. No Wi-Fi 5 inference from the 5 GHz band.

Wi-Fi 41Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Wi-Fi 802.11a/b/g/n 2.4GHz+5GHz, so Wi-Fi 4 on two bands.

Wi-Fi bands

2.4 GHz, 5 GHz1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

2.4 GHz, 5 GHz1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

CellulariTrue when a cellular edition is sold. A variant row states whether that individual model has cellular hardware.

No4Reviewandroidcentral.com/wearables/oneplus-watch-3-reviewRead 8 October 2026Reviewer explicitly states no LTE option for either original colour. Not derived solely from omitted radio entries.

Yes2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: LTE (footnote 22: LTE connectivity only available in LTE models).

Network

Not available

LTE2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: LTE.

4G bandsiPublished LTE bands for the stated regional cellular model. Do not transfer bands to another region or Wi-Fi-only model.

Not available

Not available

5G bandsiPublished 5G NR bands for the stated regional cellular model. RedCap support does not establish conventional full-bandwidth phone 5G.

Not available

Not available

NFCiSome regions sell an NFC edition, so it is per variant.

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Contactless payments

Yes1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

Yes2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Release: supports Samsung Wallet for payments. Availability varies by market and paired phone.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Samsung Wallet and Samsung Pay: register cards to make payments. Region and phone restrictions apply.

Payment services

Google Wallet1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Google Wallet country, bank/card and account requirements apply.

Samsung Wallet2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Samsung Wallet.

Ultra-wideband

Not available

Not available

Satellite

Not available

Not available

ANT+

Not available

Not available

Audio

2 of 4 differ

Speaker

Yes4Reviewandroidcentral.com/wearables/oneplus-watch-3-reviewRead 8 October 2026

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Device layout lists a speaker and a microphone.8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: loudspeaker yes.

Microphones

Not available

Not available

Calls on the watchiVoice-call capability of the marketed model, including sold cellular editions. Variant radio capability and paired-phone requirements still apply.

Phone only4Reviewandroidcentral.com/wearables/oneplus-watch-3-reviewRead 8 October 2026Bluetooth calling through a paired phone. The exact original model has no cellular edition.

Cellular or phone2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: LTE connectivity only available in LTE models. The Bluetooth model makes calls through the paired phone with the HFP profile on the India page.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Phone app: make and receive calls on the watch.

Music on the watchiPlays audio stored on the watch. Remote control of phone playback or streaming alone does not qualify.

Not available

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Audio Playing Format MP3, M4A, 3GA, AAC, OGG, OGA, WAV, AMR, AWB, with 16 GB of storage. The user guide describes managing audio files saved on the watch.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Music app and Managing audio files saved on your Watch.

Controls

4 of 5 differ

ButtonsiPhysical controls used to operate the watch, excluding the rotating crown and strap-release buttons. A clickable rotating crown is counted only in Crown.

12Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026Product Overview/Buttons and Touch, printed pages 1-2: Crown plus Lower button. The clickable rotating crown is not counted as an ordinary button.

24Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Device layout lists a Home button and a Back button. Both double as electrical biosensors.

Named operating buttonsiNames of operating buttons, excluding the crown and strap-release controls.

Lower button2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026Exact manual operating-control name, excluding Crown and strap-release controls.

Home button, Back button4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Device layout: Home button (Power button) and Back button.

CrowniA crown that rotates to control the interface. A round push button that does not rotate is not a crown.

Rotating haptic4Reviewandroidcentral.com/wearables/oneplus-watch-3-reviewRead 8 October 2026Reviewer describes physical rotation with Pixel-like scroll haptic feedback. Lower push button remains separate.

None4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Device layout lists the Home and Back buttons and a touch bezel. It does not list a crown.

Rotating bezeliPhysical rotation or touch gestures around the display edge. A fixed decorative bezel is None.

Not available

Touch4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Touch bezel section: the watch has a touch bezel around the screen. Swipe it clockwise or counterclockwise to scroll.

Gestures

Not available

Not available

Battery and charging

7 of 13 differ

Battery capacityiPublished battery capacity for the stated case size. Rated and typical capacity are distinguished in source notes.

631mAh2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026Performance Parameters gives 648 mAh typical and 631 mAh rated. The stored figure is rated, matching the maker launch release. Typical capacity is not substituted without a separate field.

247mAh1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Battery capacity 247 mAh typical, not removable.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: 247mAh (typical).

Claimed battery lifeiMaker endurance claims with distinct operating modes and case sizes. With solar describes augmentation of that estimate, not hardware capability. Use false for ordinary claims without solar augmentation, true for explicitly solar-aided claims, and omit it when solar qualification is unclear. Source notes state AOD, GNSS, music and solar conditions. Do not create a normal-use row from an AOD-only claim. Low power denotes the maker battery-saver mode. Keep its typical, light-use and always-on claims separate from standard-mode claims. GPS power saving identifies an intermediate reduced-accuracy GNSS saving preset. Source notes retain the maker's preset name and published conditions. Max battery GPS is the distinct maximum-saving claim. When the maker has only one GPS saving preset, it is GPS power saving.

AOnePlus Watch 3

Mode	With solar	Hours (h)
Smartwatch	No	120
Heavy use	No	72
Low power	No	384

Source1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Up to claims: Smart mode 120 h uses official face, AOD off and Dual-Engine architecture, daily 30 min GPS running/5 min calls/15 min Bluetooth-headphone Spotify/6.5 h sleep. Heavy Smart mode 72 h uses third-party face, Dual-Engine off and AOD on, daily 30 min running/30 min music/15 min Google Maps/5 min calls/6.5 h sleep. Low-power RTOS mode 384 h retains notifications, calls and sleep tracking but limits Wear OS apps. No AOD-only or continuous-GPS row is inferred from the heavy mixed workload.6Maker product pageoneplus.com/global/oneplus-watch-3Read 8 October 2026Up to claims: Smart mode 120 h uses official face, AOD off and Dual-Engine architecture, daily 30 min GPS running/5 min calls/15 min Bluetooth-headphone Spotify/6.5 h sleep. Heavy Smart mode 72 h uses third-party face, Dual-Engine off and AOD on, daily 30 min running/30 min music/15 min Google Maps/5 min calls/6.5 h sleep. Low-power RTOS mode 384 h retains notifications, calls and sleep tracking but limits Wear OS apps. No AOD-only or continuous-GPS row is inferred from the heavy mixed workload.

BSamsung Galaxy Watch FE

Mode	With solar	Hours (h)
Smartwatch	No	40

Source1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Usage time up to 40 hours with the always-on display off. No other test conditions are stated.

Smartwatch mode (claimed)iMaker normal-use smartwatch claim without solar. A watch with only an explicit AOD-mode claim has no value here. Workloads differ and source notes must be read.

120h=CalculatedFrom Claimed battery life

40h=CalculatedFrom Claimed battery life

AOD battery life (up to)iMaker claimed smartwatch endurance with the always-on display enabled and without solar, for the base case. Source notes preserve workload and case conditions. This is a claim, not a measured test or an AOD-off estimate.

Not available

Not available

GPS mode (claimed)iMaker regular GPS/GNSS activity claim without solar, for the base case. AOD, multi-band, music and power-saving conditions have separate rows when published.

Not available

Not available

Solar chargingiPublished solar charging hardware capability. An ordinary battery estimate without solar augmentation does not prove that the watch lacks solar charging hardware.

Not available

Not available

Charging methodiThe connection at the watch, not the cable end at the USB adapter. A proprietary inductive puck is not Qi unless interoperability is explicitly established.

Magnetic pins2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026Charging, printed page 3, fits metal watch charging connectors against charging-base contacts. Conductive pins, not an inferred Qi/inductive puck.9Press articleandroidcentral.com/accessories/oneplus-launches-a-little-cable-upgrade-you-didnt-know-your-charger-was-missingRead 8 October 2026Exact compatible OnePlus Watch 3 charging accessory explicitly uses an integrated magnetic pogo-pin connector. This corroborates the supplied-base metal-contact mechanism. Accessory power ratings are not transferred to watch maximum accepted power.

Proprietary wireless charger2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: WPC-based wireless charging. Not established as generic Qi.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Wireless charger section: the watch has a built-in wireless charging coil. Use the wireless charger supplied with the watch. It cannot be charged properly with some third-party pads when the band is attached.

Charging guidanceiPublished charging requirements, nominal estimates and compatibility guidance. Keep adapter ratings separate from power accepted by the watch.

Not available

Samsung describes WPC-based wireless charging. The user guide says to charge with the supplied wireless charger on a USB power adapter and that some third-party charging pads do not work with the band attached. The adapter rating is not published.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Wireless charging section: connect the wireless charger to the USB power adapter and place the watch on it. Use only the wireless charger supplied with the watch. Some third-party charging pads do not charge the watch with the band attached. No adapter rating is given.

Max charging power (watch)iPublished maximum charging power at the watch. Adapter rating or charger input power does not prove the power accepted by the watch.

Not available

Not available

Fast chargingiAn explicit fast-charging capability claim. A short charging time or high adapter wattage alone does not qualify.

Yes2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026VOOC flash charge is explicit. Uses supplied charging base/cable, battery temperature 20-40 C and a qualifying adapter rated 5 V/2 A or higher.

Not available

Quick charge claimiMaker claim for usage from a short charge. Source notes identify the usage workload, such as normal use or sleep tracking.

Charge time10 minUse time24 h3Press releaseoneplus.com/us/press/press-release/oneplus-unveils-its-latest-flagship-smartwatch-oneplus-watch-3Read 8 October 2026Maker claims a full day of Smart-mode use from 10-minute charge. Includes the published battery workload, not arbitrary screen/GPS-on time. Flash charging also requires the qualifying base, adapter and battery temperature from the manual.

Not available

Charge 0 to 80% (claimed)iMaker claim for charging an empty battery to 80%. Charger and approximate qualifiers belong in source notes.

Not available

Not available

Full charge time (claimed)iMaker advertised nominal full-charge duration. Approximate or theoretical maker estimates are allowed, with their conditions in source notes. Partial-charge intervals do not qualify. Measured 0 to 100% tests have a separate field.

Not available

Not available

Measured

2 of 4 differ

Peak brightness (measured)iReviewer measurement. Source notes state screen area, mode and ambient light. A small-area peak claim cannot be replaced with a full-screen measurement.

Not available

Not available

Battery life (measured)iReviewer-observed mixed-use endurance. Source notes state case size, AOD, workout use and whether it was a complete discharge. Extrapolation from partial discharge is excluded.

96h4Reviewandroidcentral.com/wearables/oneplus-watch-3-reviewRead 8 October 2026Original Obsidian Titanium review sample: reviewer regularly observed a full 4 days with AOD on, nightly sleep tracking and 1 hour tracked exercise/day. 96 h is exact conversion of the published 4 days. Firmware, exercise GNSS share and brightness are unstated. This is mixed-use observation, not standardized continuous GPS. Projected 6-7 day daytime/AOD-off claims and unspecified-start charging observations are omitted.

Not available

Battery tests (measured)iReviewer-observed endurance, with case size and test settings in source notes. Partial-discharge projections are not stored as measured endurance.

AOnePlus Watch 3

Test	Hours (h)
Mixed use, always-on	96

Source4Reviewandroidcentral.com/wearables/oneplus-watch-3-reviewRead 8 October 2026Same 96 h AOD-on observational cycle as the scalar, original large Obsidian sample with nightly sleep and 1 h exercise/day. No 43 mm measurement is imported.

BSamsung Galaxy Watch FE

Test	Hours (h)
Mixed use, always-on	27
Mixed use, always-on display off	39

Source11Reviewmezha.ua/en/reviews/galaxy-watch-fe-an-affordable-smartwatch-on-wear-osRead 13 October 2026Review of the 40 mm model. About 27 hours with the always-on display on and regular heart rate tracking. 39 hours with the always-on display off and a 5 km GPS run added. The reviewer does not state the complete test protocol.

Full charge time (measured)iReviewer measurement from empty to full, not 0-80% or a charge from 5%. Source notes name the charger and case size.

Not available

Not available

Strap

3 of 6 differ

Lug widthiDistance between standard strap attachment lugs, not the decorative width of a proprietary strap. Unknown for custom connectors unless the maker publishes lug width.

22mm1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Published standard 22 mm watchband compatibility describes conventional strap attachment, not a decorative proprietary connector width.6Maker product pageoneplus.com/global/oneplus-watch-3Read 8 October 2026Published standard 22 mm watchband compatibility describes conventional strap attachment, not a decorative proprietary connector width.

20mm8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Standard 20 mm straps.

Quick-release strapiThe supplied strap can be detached through its quick-release mechanism. Compatibility with quick-release replacement straps alone does not qualify.

Yes2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026Product Overview labels Strap Release and Attachment controls for the supplied conventional strap.10Reviewthe-gadgeteer.com/2025/03/16/oneplus-watch-3-review-a-solid-big-smartwatch-with-battery-for-literal-daysRead 8 October 2026Design and features identifies actual supplied strap quick-release buttons on the original large review sample. Not merely replacement-band compatibility.

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page: press the release button on the one-click band to detach the band.

Strap systemiPublished attachment system and compatible case sizes. Proprietary connectors are distinguished from standard spring bars.

Standard 22 mm watchbands1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Linked maker product page explicitly supports all standard 22 mm watchbands.6Maker product pageoneplus.com/global/oneplus-watch-3Read 8 October 2026Linked maker product page explicitly supports all standard 22 mm watchbands.

Standard 20 mm straps with Samsung one-click band release8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: compatible with standard 20mm straps. The Mezha review also says any 20 mm strap fits.

Strap materialiMaterial of the supplied strap for the stated package. Do not substitute material from another band sold separately.

Not available

Not available

Strap

Not available

Not available

Strap sizesiPublished wrist-circumference range for the stated strap or case. Source notes distinguish an overall compatible wrist range from one supplied strap size.

AOnePlus Watch 3

Wrist (min) (mm)	Wrist (max) (mm)
140	210

Source1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

BSamsung Galaxy Watch FE

Not available

Regulatory

1 of 3 differ

FCC ID

Not available

A3LSMR86110Press articledroid-life.comRead 13 October 2026Droid Life article on the FCC filing: model SM-R861, FCC ID A3LSMR861, tested for Bluetooth and Wi-Fi only. The FCC ID for the LTE models is not found.

SAR limb (US)iPublished limb/wrist SAR for the stated base regional model under the US regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

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SAR limb (EU)iPublished limb/wrist SAR for the stated base regional model under the EU regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

0.312W/kg2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026English CE SAR section, printed page 5: limb 0.312 W/kg in direct contact with the watch back. Face 0.150 W/kg is excluded.

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Other certifications

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In the box

2 of 2 differ

In the box

Watch body, Charging base, Strap, Safety Guide, Quick Start Guide, USB-C charging cable1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

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Power adapter in boxiA mains/USB power adapter is supplied. A charging cable, inductive puck or charging dock alone does not count.

No1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026Complete box list supplies charging base and cable but no mains/USB power adapter.

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Links

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Product page

www.oneplus.com/uk/oneplus-watch-31Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

www.samsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkains1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Samsung India product page for the Bluetooth 40 mm model. The page lists Launch date 26 September 2024 for India.

Spec sheet

www.oneplus.com/uk/oneplus-watch-3/specs1Maker product pageoneplus.com/uk/oneplus-watch-3/specsRead 8 October 2026

www.samsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkains1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Manual

manuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdf2Owner's manualmanuals.plus/m/1d67b974739804b0af768b59851b1d7b7454726774db7bbc8ee939a02edfcf62_optim.pdfRead 8 October 2026Maker Quick Start Guide for OPWWE251, hosted in a public document mirror. The official manual portal was checked but returned only a script shell.

org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026User guide SM-R861, English (CA), 06/2024, Rev. 1.0 on Samsung Download Center.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

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Warranty

None of 1 known

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

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Both are also in the API. Back to all smartwatches.