Smartwatches / Compare

COROS PACE 3 vs Garmin Forerunner 255

A

Product A: COROS

PACE 3

67 of 150 known

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B

Product B: Garmin

Forerunner 255

81 of 150 known

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Every value links to where we found it.

Only differences

ACOROS PACE 3

BGarmin Forerunner 255

General

7 of 10 differ

Series

PACE2Maker product pagecoros.com/pace3Read 13 October 2026Product title COROS PACE 3 GPS Sport Watch.

Forerunner1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Product page title is Forerunner 255, running smartwatch, 46 mm.

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

WPACE3-BLK, WPACE3-WHT, WPACE3-PUR, WPACE3-CHK, WPACE3-INK2Maker product pagecoros.com/pace3Read 13 October 2026Store variants: WPACE3-BLK (Black / Silicone), WPACE3-WHT (White / Silicone), WPACE3-PUR (Violet), WPACE3-CHK (Chalk), WPACE3-INK (Ink). The option list also names Emerald, Mist and Valencia Edition, which have no SKU listed now.

010-02641-011Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026US page for the 46 mm watch without music lists part number 010-02641-01 (Tidal Blue, $349.99). The Music toggle on the same page links the music watch to 010-02641-20, so music watches are other models. 255S is the 41 mm size, SKU 010-02641-02.

GTIN / EAN

810005782630, 810005782616, 810005783040, 810005783163, 8100057831562Maker product pagecoros.com/pace3Read 13 October 2026Barcodes of the five store variants.

Not available

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

29 August 20233Press articleathleticsweekly.com/aw-promotion/coros-unveils-the-pace-3-gps-sport-watch-1039971227Read 13 October 2026Published 29 August 2023. Shipping expected from the week of 5 September 2023.

1 June 20223Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026Garmin release dated June 1, 2022.

Status

Available2Maker product pagecoros.com/pace3Read 13 October 2026The maker store lists the watch at 199 USD, compare-at 229 USD. Only Chalk is marked available on the access date. The5krunner lists the model as discontinued in February 2026.

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.

COROS PACE 45Spec databasethe5krunner.com/specs/coros/pace-3Read 13 October 2026Lists the COROS Pace 4 as the successor.6Reviewnotebookcheck.net/Coros-Pace-4-launches-as-new-runners-smartwatch-with-AMOLED-display-and-improved-battery-life.1159704.0.htmlRead 23 October 2026Notebookcheck calls the Pace 4 a fourth-generation Pace and names the outgoing Pace 3 as its predecessor.

Garmin Forerunner 2658Reviewdcrainmaker.com/2023/03/garmin-forerunner-review-amoled.htmlRead 11 October 2026Review: the Forerunner 265 series at first glance seems like an AMOLED version of the Forerunner 255, with several hardware differences. It follows the 255 in the Forerunner line.10Maker product pagegarmin.com/nl-NL/blogRead 23 October 2026Garmin's Dutch blog says the Forerunner 265 is the successor of the Forerunner 255.

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

$2293Press articleathleticsweekly.com/aw-promotion/coros-unveils-the-pace-3-gps-sport-watch-1039971227Read 13 October 2026MSRP 229 USD. US prices exclude sales tax.

$349.993Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026Suggested retail price $349.99 for Forerunner 255 and 255S. Music models are $399.99.

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.

€2493Press articleathleticsweekly.com/aw-promotion/coros-unveils-the-pace-3-gps-sport-watch-1039971227Read 13 October 2026MSRP 249 EUR, as printed.

€349.994Press articlenextpit.de/news/garmin-forerunner-255-und-955-vorgestellt-touchscreen-mehr-akkuRead 11 October 2026nextpit.de, 1 June 2022: the Forerunner 255 costs 349,99 EUR in every size, the Music edition 50 EUR more. German price incl. VAT.

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

Not available

US, DE3Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026US release with US dollar suggested retail prices.4Press articlenextpit.de/news/garmin-forerunner-255-und-955-vorgestellt-touchscreen-mehr-akkuRead 11 October 2026German launch pricing in euros. Documented subset together with the US release.

ColoursiThe maker's own colour names

Black / Silicone, White / Silicone, Violet, Chalk, Ink2Maker product pagecoros.com/pace3Read 13 October 2026Colour option names as printed in the store variants.

Tidal Blue1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026US store lists Tidal Blue for this model. Other regional colours exist but are not listed on this page.3Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026Release names tidal blue as a new colour.

Segment

Sport2Maker product pagecoros.com/pace3Read 13 October 2026Maker product type is a GPS sport watch for multi-sport athletes.

Sport1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin presents it as a running smartwatch.

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

4 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.

41.9mm1Maker product pagecoros.com/pace3/specsRead 13 October 2026Single case. Physical width and height 41.9 mm. COROS publishes no case-size name.

46mm1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Case shape

Round1Maker product pagecoros.com/pace3/specsRead 13 October 2026Round case in the maker images. Dimensions are 41.9 x 41.9 mm.

Round1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs describe the display as a diameter and the pictured case is round.

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.

Fibre-reinforced polymer1Maker product pagecoros.com/pace3/specsRead 13 October 2026Cover material and bezel material are both Fiber Reinforced Polymer.

Fibre-reinforced polymer6Reviewandroidcentral.com/wearables/garmin-forerunner-255-reviewRead 11 October 2026Review spec box: materials fiber-reinforced polymer. The maker lists only the bezel as fiber-reinforced polymer and no other case material.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: fiber-reinforced polymer bezel and case, silicone strap.

Case material (as published)

Fiber Reinforced Polymer1Maker product pagecoros.com/pace3/specsRead 13 October 2026

Fiber-reinforced polymer6Reviewandroidcentral.com/wearables/garmin-forerunner-255-reviewRead 11 October 2026Review spec box wording.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table wording.

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

Not available

Not available

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

Height41.9Width41.9Thickness11.7mm(1.6 × 1.6 × 0.5 in)1Maker product pagecoros.com/pace3/specsRead 13 October 2026Dimensions 41.9 x 41.9 x 11.7 mm. Note on the page: height does not include the optical heart rate sensor.

Height45.6Width45.6Thickness12.9mm(1.8 × 1.8 × 0.5 in)1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Physical size 45.6 x 45.6 x 12.9 mm. Not stated whether the heart rate sensor bump is included.

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

Not available

Not available

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

39g(1.4 oz)1Maker product pagecoros.com/pace3/specsRead 13 October 2026Weight 39 g with silicone band and 30 g with nylon band. The case-only weight row is empty. The base row is the silicone band. Nylon variants carry 30 g. A review lists 38 g for silicone, and the maker value is kept.

Not available

Durability

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

5ATM1Maker product pagecoros.com/pace3/specsRead 13 October 20265 ATM. Suitable for surface water activities and not for diving.

5ATM1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Water rating 5 ATM.

Water resistance standard

Not available

Not available

Dust and water rating

Not available

Not available

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.

Not available

Not available

MIL-STD-810 tests

Not available

Not available

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

Min-20Max50°C1Maker product pagecoros.com/pace3/specsRead 13 October 2026Working temperature -4 to 122 degrees F (-20 to 50 degrees C). Storage temperature is -20 to 60 degrees C and is not stored.

Min-20Max60°C2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Specifications page 101: operating temperature -20 to 60 C. Charging range 0 to 45 C is excluded.

Display

7 of 14 differ

Display type

MIP1Maker product pagecoros.com/pace3/specsRead 13 October 2026Display type Touch Screen Always-On Memory LCD. Stored as memory-in-pixel (mip). The overview calls it a 1.2 inch transflective touchscreen.

MIP1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Display type sunlight-visible, transflective memory-in-pixel (MIP).

Display type (as published)

Touch Screen Always-On Memory LCD1Maker product pagecoros.com/pace3/specsRead 13 October 2026

Sunlight-visible, transflective memory-in-pixel (MIP)1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

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

1.2in(3 cm)1Maker product pagecoros.com/pace3/specsRead 13 October 2026

1.3in(3.3 cm)1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: 1.3 inch (33 mm) diameter.

Resolution

240 × 240px1Maker product pagecoros.com/pace3/specsRead 13 October 2026240 x 240 with 64 colors.

260 × 260px1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: 260 x 260 pixels.

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

Not available

Not available

Display area

Not available

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Touchscreen

Yes2Maker product pagecoros.com/pace3Read 13 October 2026Overview bullet: always-on 1.2 inch transflective touchscreen display.

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026The manual describes control only with the LIGHT, UP, DOWN, BACK and START/STOP buttons and never mentions touch input.

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.

Not available

Not available

Minimum brightness

Not available

Not available

Always-on display

Yes2Maker product pagecoros.com/pace3Read 13 October 2026Same overview bullet.

Not available

Display cover

Other glass1Maker product pagecoros.com/pace3/specsRead 13 October 2026

Gorilla Glass1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Display cover (as published)

Mineral Glass1Maker product pagecoros.com/pace3/specsRead 13 October 2026Screen material Mineral Glass.

Corning Gorilla Glass 31Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Lens material Corning Gorilla Glass 3. Bezel material is fiber-reinforced polymer. Case material is not listed, so case_material is not stored.

Platform

1 of 15 differ

Platform

Proprietary2Maker product pagecoros.com/pace3Read 13 October 2026COROS own firmware and COROS app. No Wear OS or watchOS.

Proprietary1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin watch software with downloadable Connect IQ watch faces, data fields and apps.

OS at launch

Not available

Not available

Software

Not available

Not available

Latest OS

Not available

Not available

Works with

iOS, Android4Reviewdcrainmaker.com/2023/11/coros-depth-review.htmlRead 13 October 2026Needs a smartphone, either iOS or Android, to set up and use the watch.

iOS, Android1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Phone requirement

Not available

Not available

App store

Not available

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Connect IQ downloadable watch faces, data fields and apps and an on-device Connect IQ store.

Voice assistants

Not available

Not available

Chipset

Not available

Not available

Process

Not available

Not available

CPU cores

Not available

Not available

CPU configuration

Not available

Not available

Max CPU clock

Not available

Not available

GPU

Not available

Not available

Low-power coprocessor

Not available

Not available

Memory

0 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.

Not available

Not available

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.

4GB1Maker product pagecoros.com/pace3/specsRead 13 October 2026Internal memory 4 GB. Activity memory is 1200 hours.

4GB1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Memory/History 4 GB. The manual lists up to 4 GB of music storage for Music models only.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Music storage up to 4 GB applies to Music models.

Health sensors

3 of 8 differ

Heart rate sensor

Optical Heart Rate Monitor (5 LEDs, 4 photodetectors)1Maker product pagecoros.com/pace3/specsRead 13 October 2026Track sensors: Optical Heart Rate Monitor (may not work over tattoos). The overview says 5 LEDs and 4 photodetectors.

Garmin Elevate wrist heart rate monitor1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

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

Not available

No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: electrical heart rate No, ECG No. The Garmin product page lists no ECG sensor or app.

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

Yes1Maker product pagecoros.com/pace3/specsRead 13 October 2026Optical Pulse Oximeter listed under track sensors.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Pulse Ox blood oxygen, spot-check and optional all-day acclimation and in sleep. Not available in all countries.

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

Not available

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026The manual describes an internal temperature sensor whose reading is affected by body temperature and offers an external tempe sensor for ambient temperature. No skin temperature function is described.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: skin temperature No. The Garmin page lists only a thermometer.

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

Not available

Not available

Body composition sensor

Not available

Not available

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

1 of 9 differ

Accelerometer

Yes1Maker product pagecoros.com/pace3/specsRead 13 October 2026

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pagecoros.com/pace3/specsRead 13 October 2026

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Barometric altimeter

Yes1Maker product pagecoros.com/pace3/specsRead 13 October 2026

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Compass

Yes1Maker product pagecoros.com/pace3/specsRead 13 October 20263D Compass listed under track sensors.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Ambient light sensor

Not available

No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: ambient light sensor No. The Garmin sensor list has none.

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

3 of 5 differ

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

Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking1Maker product pagecoros.com/pace3/specsRead 13 October 2026Daily features list Daily Stress, Sleep with REM tracking and HRV. The overview says the optical sensors track sleep, SpO2 and workout intensity and track awake, REM, light and deep sleep. HRV arrived by firmware after launch.

Continuous heart rate, Heart rate alerts, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Cycle tracking1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list heart rate every second, high and low abnormal heart rate alerts, Pulse Ox, HRV status, advanced sleep, all-day stress and women's health in Garmin Connect. Sleep stages are in the manual.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Sleep statistics include total hours of sleep, sleep stages and sleep score (page 42 area).

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, Training load, Recovery advice, Running power, Open water swim, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback1Maker product pagecoros.com/pace3/specsRead 13 October 2026Training features: EvoLab (recovery, fatigue, training load, race predictor, VO2 max), Basic Interval Training. Navigation: Checkpoint, Back-To-Start, Deviation Alert. Overview text also names Turn-by-Turn navigation. A review calls turn-by-turn a public beta at launch and says the watch has native running power.

VO2 max, Training load, Recovery advice, Running dynamics, Running power, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Trackback1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list VO2 Max (run), training load, recovery time, running dynamics, running power, pool and open-water swim metrics, automatic rep counting, interval training, course guidance and TracBack. Running dynamics need a pod or HRM-Pro. No golf course or ClimbPro entry.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Page 62: running power can be measured with a compatible running dynamics accessory or the watch sensors. Page 63: Running Dynamics Pod records running dynamics.

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.

Heart rate strap, Power meter, Speed and cadence, Foot pod4Reviewdcrainmaker.com/2023/11/coros-depth-review.htmlRead 13 October 2026Supports Bluetooth power meters, cadence sensors, speed sensors, heart rate straps, running footpods and Stryd.

Heart rate strap, Power meter, Speed and cadence, Foot pod, Smart trainer1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list heart rate from external HRM, power meter compatible, speed and cadence sensor support, foot pod capable and smart trainer control.

Safety

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

Not available

No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list only incident detection during select activities, which is limited to certain outdoor activities. Not counted as general fall detection.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Page 83: incident detection is a supplemental feature available only for certain outdoor activities.

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

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Assistance. The manual says it sends a message with name, LiveTrack link and GPS location to emergency contacts through a paired phone with data. It does not call emergency services.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Safety and Tracking, page 84: Assistance sends a message with name, LiveTrack link and GPS location to emergency contacts. Paired phone with data plan required.

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

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list live event sharing (Android only). The manual lists LiveTrack.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Safety and Tracking: LiveTrack lets friends and family follow activities in real time.

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

Not available

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Controls menu: Flashlight turns on the screen to use the watch as a flashlight. A lit display is not a dedicated LED.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: LED flashlight No, matching the manual.

Positioning

1 of 3 differ

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

GPS, GLONASS, Galileo, BeiDou, QZSS1Maker product pagecoros.com/pace3/specsRead 13 October 2026Satellite systems GPS, GLONASS, Galileo, Beidou, QZSS.

GPS, GLONASS, Galileo, QZSS, BeiDou1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list GPS, GLONASS, Galileo, QZSS and BeiDou. Multi-band GPS is listed. Signal bands are not named.

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

Yes1Maker product pagecoros.com/pace3/specsRead 13 October 2026GNSS chipset row: All-Satellite Dual-Frequency.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Multi-band GPS. Battery table calls it All-Systems GNSS plus Multi-Band.

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

No1Maker product pagecoros.com/pace3/specsRead 13 October 2026Map layer lists Breadcrumb only. No map data is described.

No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026No map entry in the specs. Only breadcrumb trail, courses and TracBack are listed, which are not offline maps.

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.

Yes1Maker product pagecoros.com/pace3/specsRead 13 October 2026Phone and accessories connect over Bluetooth.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Bluetooth version

Not available

Not available

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

Yes1Maker product pagecoros.com/pace3/specsRead 13 October 2026Data sync row: Wi-Fi / COROS App. Firmware updates use Wi-Fi and the COROS app.4Reviewdcrainmaker.com/2023/11/coros-depth-review.htmlRead 13 October 2026The review lists added Wi-Fi.

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Status icons: Wi-Fi technology status for Forerunner music watches only. The spec table lists no Wi-Fi for this model.

Wi-Fi standard

Not available

Not available

Wi-Fi bands

Not available

Not available

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

No4Reviewdcrainmaker.com/2023/11/coros-depth-review.htmlRead 13 October 2026No cellular radio is listed in the maker specs or the review.

No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Connectivity as Bluetooth and ANT+ only. No Wi-Fi and no cellular.

Network

Not available

Not available

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.

No5Spec databasethe5krunner.com/specs/coros/pace-3Read 13 October 2026Page states no ANT+ and no NFC.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin Pay contactless payments are listed. NFC itself is not named in the specs.

Contactless payments

No5Spec databasethe5krunner.com/specs/coros/pace-3Read 13 October 2026No NFC, so no contactless payments.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin Pay is listed.

Payment services

Not available

Garmin Pay1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Ultra-wideband

Not available

No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: UWB No. Garmin lists Bluetooth and ANT+ only.

Satellite

Not available

Not available

ANT+

No4Reviewdcrainmaker.com/2023/11/coros-depth-review.htmlRead 13 October 2026ANT+ accessory support was removed. Only Bluetooth sensors are supported.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Audio

3 of 4 differ

Speaker

Not available

No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: speakers No. Garmin lists no voice calls, speaker or music playback for this non-music model.

Microphones

Not available

07Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: microphone No. Garmin lists no voice calls or microphone for this model.

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

None1Maker product pagecoros.com/pace3/specsRead 13 October 2026Daily features list Message/Call Alert only, for daily use and training. No call function is listed.

None1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list text response and reject phone call with text only. No voice call, speaker or microphone entry and no cellular. No voice calls on the watch.

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

Yes1Maker product pagecoros.com/pace3/specsRead 13 October 2026Daily features: plays offline music when paired with supported Bluetooth headsets. Storage is 4 GB.

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Specifications page 101 lists music media storage for Forerunner music watches (Forerunner 255 Music). This model is the non-music 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.

11Maker product pagecoros.com/pace3/specsRead 13 October 2026Design row lists Digital Dial and Back Button. The dial is counted as the crown, so one other control button remains.

52Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview, page 2: LIGHT, UP, DOWN, BACK and START/STOP.

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

Back button1Maker product pagecoros.com/pace3/specsRead 13 October 2026

LIGHT, UP, DOWN, BACK, START/STOP2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview page 2. START and STOP share one button.

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

Rotating1Maker product pagecoros.com/pace3/specsRead 13 October 2026Digital Dial. A review calls it the Digital Crown and says it scrolls menus and confirms.

None2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview shows five buttons and no crown.

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

None1Maker product pagecoros.com/pace3/specsRead 13 October 2026The design row lists only a digital dial and a back button. No rotating bezel.

None2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview shows five buttons and no rotating bezel.

Gestures

Not available

Raise and turn your arm to turn on the backlight2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Backlight settings: Gesture turns on the backlight by raising and turning your arm to look at your wrist.

Battery and charging

5 of 13 differ

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

Not available

Not available

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.

ACOROS PACE 3

Mode	With solar	Hours (h)
Smartwatch	No	360
GPS	No	38
GPS with music	No	10
GPS, all systems	No	25
GPS, all systems with music	No	9
GPS, dual-band	No	15
GPS, dual-band with music	No	7

Source1Maker product pagecoros.com/pace3/specsRead 13 October 2026Battery table: Standard Full GPS 38 h, 10 h with offline music. All Systems On 25 h, 9 h with music. All Systems Dual-Frequency On 15 h, 7 h with music. Daily Use 15 days, stored as 360 h. The launch release and a review give 24 days for continuous daily use, and the current page replaced that with 15 days.

BGarmin Forerunner 255

Mode	With solar	Hours (h)
Smartwatch	No	336
GPS	No	30
GPS, all systems	No	25
GPS, dual-band	No	16

Source1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Smartwatch mode up to 14 days (336 h). GPS-only GNSS up to 30 h. All-Systems GNSS up to 25 h. All-Systems plus Multi-Band up to 16 h. Manual footnote: smartwatch mode includes activity tracking, phone notifications and wrist heart rate.

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.

360h=CalculatedFrom Claimed battery life

336h=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.

38h=CalculatedFrom Claimed battery life

30h=CalculatedFrom Claimed battery life

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

No9Reviewdcrainmaker.com/2022/06/garmin-forerunner-multisport.htmlRead 11 October 2026Review covers the Forerunner 255, 255S, 255 Music and 255S Music with no solar model. Solar is introduced in this launch only on the Forerunner 955 Solar.

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.

Not available

Proprietary plug1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Garmin proprietary plug charger.

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

Not available

Not available

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.

Not available

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.

Not available

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.

120min1Maker product pagecoros.com/pace3/specsRead 13 October 2026Charging time: Less Than 2 Hours. Stored as 120 min. A review lists 1.5 hours.

120min2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Tips for charging: charging a fully depleted battery takes up to two hours, from a Garmin approved AC adapter or a computer USB port. Stored as a nominal claim of 120 minutes with the up-to qualifier.

Measured

None of 4 known

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.

Not available

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.

Not available

Not available

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 pagecoros.com/pace3/specsRead 13 October 2026Width 22 mm.

22mm1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: quick release bands, 22 mm, industry standard.

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

Yes1Maker product pagecoros.com/pace3/specsRead 13 October 2026Installation type Quick Release.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

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

22 mm quick-release bands1Maker product pagecoros.com/pace3/specsRead 13 October 2026

Industry standard 22 mm quick release bands1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

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

Silicone1Maker product pagecoros.com/pace3/specsRead 13 October 2026Band material Silicone / Nylon. Each colour option uses one of them.

Silicone1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Strap material silicone.

Strap

Black silicone band2Maker product pagecoros.com/pace3Read 13 October 2026Variant image descriptions name the supplied band: Black silicone band, White silicone band, Violet silicone band, Chalk nylon band and Ink nylon band.

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.

ACOROS PACE 3

Size	Wrist (min) (mm)	Wrist (max) (mm)
Silicone	130	215

Source1Maker product pagecoros.com/pace3/specsRead 13 October 2026Wrist size: silicone 130-215 mm. Nylon 135-205 mm (Standard) and 150-235 mm (Long).

BGarmin Forerunner 255

Wrist (min) (mm)	Wrist (max) (mm)
130	205

Source1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: fits wrists with a circumference of 130-205 mm. This is the overall range for the watch with its supplied silicone strap.

Regulatory

1 of 3 differ

FCC ID

Not available

Not available

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.

Not available

Not available

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.

Not available

Not available

Other certifications

Not available

ANT+ certified2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Front matter: this product is ANT+ certified.

In the box

2 of 2 differ

In the box

Watch band, Charging cable2Maker product pagecoros.com/pace3Read 13 October 2026Overview bullet: watchband and charging cable included.

Forerunner 255, Charge/data cable, Documentation1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026In the Box tab: Forerunner 255, charge/data cable, documentation.

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

Not available

No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Box lists a charge/data cable and no power adapter.

Links

Not compared

Product page

coros.com/pace32Maker product pagecoros.com/pace3Read 13 October 2026

www.garmin.com/en-US/p/780139/pn/010-02641-011Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026US store page for SKU 010-02641-01.

Spec sheet

coros.com/pace3/specs1Maker product pagecoros.com/pace3/specsRead 13 October 2026The specs page is rendered in the browser from data embedded in the page. The values below are those embedded en-US values, read with a plain request and no login.

www.garmin.com/en-US/p/780139/pn/010-02641-011Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026The specs tab of the US product page holds the full specification list for the 46 mm watch.

Manual

Not available

www8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdf2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026

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.

Not available

Not available

Warranty

1 of 1 differ

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.

2years2Maker product pagecoros.com/pace3Read 13 October 2026Store metafield warranty_duration: 2-year.

1year5Maker product pagegarmin.com/en-US/legal/consumer-limited-warrantyRead 11 October 2026Garmin consumer limited warranty, US: non-aviation products are free from defects in materials or workmanship for one year from the date of purchase.

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