Smartwatches / Compare

COROS APEX 4 vs Garmin fēnix 9

A

Product A: COROS

APEX 4

75 of 150 known

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B

Product B: Garmin

fēnix 9

91 of 150 known

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Every value links to where we found it.

Only differences

ACOROS APEX 4

BGarmin fēnix 9

General

7 of 10 differ

Series

APEX1Maker product pagecoros.com/apex4/specsRead 15 October 2026COROS APEX line. The overview page lists APEX in 2018, APEX Pro in 2019, APEX 2 in 2022 and APEX 4 in October 2025.

fēnix1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

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

WAPX4-BLK-42, WAPX4-WHT-42, WAPX4-BLK-46, WAPX4-WHT-46, W542, W5412Maker product pageshop.coros.com/products.jsonRead 15 October 2026US store feed SKUs WAPX4-BLK-42, WAPX4-WHT-42, WAPX4-BLK-46 and WAPX4-WHT-46 for the watch alone. The feed has no barcodes, so no GTIN is stored.14Regulatory filingfccid.co/fcc/2BBGF-W542Read 15 October 2026FCC model W542 is the 42 mm. W541 is the 46 mm.

010-04761-00, 010-04761-10, 010-04761-05, 010-04762-00, 010-04762-10, 010-04763-00, 010-04763-101Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026US store SKUs for the base fēnix 9 (no Pro, no inReach, AMOLED). 43 mm: 010-04761-00 Fog Gray and 010-04761-10 Pebble Gray. 47 mm: 010-04762-00 and 010-04762-10. 51 mm: 010-04763-00 and 010-04763-10. 010-04761-05 is the Singapore SKU. Garmin UK and EU stores sell the same hardware under -01 and -11 numbers, which are not added.4Maker product pagegarmin.com.sg/products/wearables/fenix-9-43-fog-grayRead 14 October 2026Part Number 010-04761-05, fēnix 9 - 43 mm, Titanium with Fog Gray Silicone Band. Same 43 mm spec table as the US SKU.

GTIN / EAN

Not available

753759380960, 753759380984, 753759381004, 753759381028, 753759381042, 75375938106610Retailer pageabt.com/Garmin-Fenix-9-Smartwatch-43mm-Titanium-with-Fog-Gray-Silicone-Band-0100476100/p/248241.htmlRead 14 October 2026Product data for 010-04761-00 gives GTIN-13 0753759380960. Stored as the 12-digit UPC 753759380960.11Retailer pageabt.com/Garmin-Fenix-9-Smartwatch-43mm-Titanium-with-Pebble-Gray-Silicone-Band-0100476110/p/248242.htmlRead 14 October 2026Product data for 010-04761-10 gives GTIN-13 0753759380984. Stored as the 12-digit UPC 753759380984.12Retailer pageabt.com/Garmin-fenix-9-Smartwatch-47mm-in-Titanium-with-Pebble-Gray-Silicone-Band-0100476200/p/248243.htmlRead 14 October 2026Product data for 010-04762-00 gives GTIN-13 0753759381004. Stored as the 12-digit UPC 753759381004.13Retailer pageabt.com/Garmin-fenix-9-Smartwatch-47mm-in-Carbon-Gray-DLC-Titanium-with-Black-Silicone-Band-0100476210/p/248244.htmlRead 14 October 2026Product data for 010-04762-10 gives GTIN-13 0753759381028. Stored as the 12-digit UPC 753759381028.14Retailer pageabt.com/Garmin-fenix-9-GPS-Smartwatch-51mm-in-Titanium-with-Pebble-Gray-Silicone-Band-0100476300/p/248245.htmlRead 14 October 2026Product data for 010-04763-00 gives GTIN-13 0753759381042. Stored as the 12-digit UPC 753759381042.15Retailer pageabt.com/Garmin-fenix-9-Smartwatch-51mm-in-Carbon-Gray-DLC-Titanium-with-Black-Silicone-Band-0100476310/p/248246.htmlRead 14 October 2026Product data for 010-04763-10 gives GTIN-13 0753759381066. Stored as the 12-digit UPC 753759381066.

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

15 October 20255Press releasecoros.com/stories/press-release/c/coros-announces-apex-4Read 15 October 2026Release dated 15 October 2025 in Irvine, California.

25 August 20266Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-expands-its-flagship-performance-smartwatch-lineup-with-fenix9-and-fenix9-proRead 14 October 2026

Status

Available1Maker product pagecoros.com/apex4/specsRead 15 October 2026The COROS US and EU stores list both sizes with a Buy now button.

Available1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026All six US SKUs are sellable and show 'Available to ship in 1-3 business days' on the accessed date.

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

Not available

Garmin fēnix 8 AMOLED6Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-expands-its-flagship-performance-smartwatch-lineup-with-fenix9-and-fenix9-proRead 14 October 2026The release says the display is twice as bright as its predecessor. The Garmin store page makes the same comparison with the fēnix 8.16Reviewnotebookcheck.net/Garmin-releases-new-high-end-smartwatch-globally-with-brighter-AMOLED-display-and-29-days-battery-life.1378019.0.htmlRead 23 October 2026Notebookcheck says the Fenix 9 directly replaces the Fenix 8.17Reviewdcrainmaker.com/2024/08/garmin-fenix-8-in-depth-review.htmlRead 23 October 2026DC Rainmaker's Fenix 8 review carries a note saying it has been replaced by the Garmin Fenix 9 AMOLED.

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.

Not available

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.

$4295Press releasecoros.com/stories/press-release/c/coros-announces-apex-4Read 15 October 202642 mm 429 USD and 46 mm 479 USD. US prices exclude sales tax.

$999.996Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-expands-its-flagship-performance-smartwatch-lineup-with-fenix9-and-fenix9-proRead 14 October 2026fēnix 9 starts at $999.99 (US). The release gives no per-size prices. Per-size launch prices come from the5krunner.9Spec databasethe5krunner.com/specs/garmin/fenix-9Read 14 October 2026Launch prices: $999.99 for 43 and 47 mm and $1,099.99 for 51 mm. The page does not split the DLC SKUs, so launch prices are stored only for the titanium Fog Gray and Pebble Gray SKUs.

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.

€4496Maker product pagecoros.com/de/buy/apex4Read 15 October 2026COROS Germany store: 449 EUR for the 42 mm and 499 EUR for the 46 mm, including VAT. The EU store feed published the German product on 2025-10-15 at the same prices. This is the same price as today, since no launch-day German price list was found.

€999.999Spec databasethe5krunner.com/specs/garmin/fenix-9Read 14 October 2026Launch prices in EUR: 999.99 for 43 and 47 mm and 1,099.99 for 51 mm. The Garmin Germany store lists the same amounts today. EUR includes VAT.

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

US, DE6Maker product pagecoros.com/de/buy/apex4Read 15 October 2026US store product page and the German store page both sell the watch.

US, SG1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 20264Maker product pagegarmin.com.sg/products/wearables/fenix-9-43-fog-grayRead 14 October 2026Singapore store page for 010-04761-05.

ColoursiThe maker's own colour names

Black, White1Maker product pagecoros.com/apex4/specsRead 15 October 2026The store sells white and black watch bodies, each with nylon or silicone straps in several strap colours. Stored are the body colours.2Maker product pageshop.coros.com/products.jsonRead 15 October 2026Store option WATCH BODY COLOR: White, Black.

Titanium with Fog Gray Silicone Band, Titanium with Pebble Gray Silicone Band, Carbon Gray DLC Titanium with Black Silicone Band1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 20264Maker product pagegarmin.com.sg/products/wearables/fenix-9-43-fog-grayRead 14 October 2026

Segment

Outdoor1Maker product pagecoros.com/apex4/specsRead 15 October 2026COROS calls it a mountain sports GPS watch for trail running, climbing and skiing. The store files it under GPS watches. Stored as outdoor.

Outdoor1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

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

25 August 20287Maker product pagegarmin.com/en-GB/p/2021177/pn/010-04761-01Read 14 October 2026Specs > Security Information on the UK store page for the fēnix 9 43 mm: Security updates until at least 2028-08-25. This is a stated minimum, not a promised end date. The AU store page shows the same date.9Spec databasethe5krunner.com/specs/garmin/fenix-9Read 14 October 2026Lists Security updates until 2028-08-25, in agreement with the Garmin UK page.

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.

42, 46mm1Maker product pagecoros.com/apex4/specsRead 15 October 2026Two sizes sold as one product, 42 mm and 46 mm. Base values describe the 42 mm case.

43, 47, 51mm1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Marketed sizes 43, 47 and 51 mm. Base values describe the 43 mm watch. Per-size values are in variants.

Case shape

Round1Maker product pagecoros.com/apex4/specsRead 15 October 2026Round case with a round Memory-in-Pixel display.

Round1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

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.

Mixed materials1Maker product pagecoros.com/apex4/specsRead 15 October 2026Materials: cover material Fiber Reinforced Polymer and bezel material Grade 5 Titanium Alloy. Stored as mixed.

Fibre-reinforced polymer1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026General > Case material: fiber-reinforced polymer with titanium rear cover. Bezel material: titanium. The 51 mm row writes Fiber-reinforced polymer with the same rear cover.

Case material (as published)

Fiber Reinforced Polymer cover with Grade 5 Titanium Alloy bezel1Maker product pagecoros.com/apex4/specsRead 15 October 2026Materials: Cover Material Fiber Reinforced Polymer, Bezel Material Grade 5 Titanium Alloy.

Fiber-reinforced polymer with titanium rear cover and titanium bezel1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026General > Case material and Bezel material, 43 mm page.

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

Not available

Titanium rear cover1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026General > Case material: titanium rear cover.

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

Height42.6Width42.6Thickness14mm(1.7 × 1.7 × 0.6 in)1Maker product pagecoros.com/apex4/specsRead 15 October 2026Size and Weight, Dimensions: 42 mm 42.6 x 42.6 x 14 mm and 46 mm 46.2 x 46.2 x 13.7 mm. Height does not include the optical heart rate sensor. The 46 mm is thinner than the 42 mm as published. The5krunner repeats both figures.

Height43Width43Thickness13.8mm(1.7 × 1.7 × 0.5 in)1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026General > Physical size 43 x 43 x 13.8 mm. Exclusions such as the sensor protrusion are not stated.

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

Not available

44g(1.6 oz)1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026General > Weight: 61 g (case only: 44 g). 43 mm case only.

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

44g(1.6 oz)1Maker product pagecoros.com/apex4/specsRead 15 October 2026Weight: 42 mm 44 g with nylon band and 56 g with silicone band. 46 mm 51 g with nylon band and 64 g with silicone band. The nylon band figure is stored. The maker publishes no case-only weight.3Maker product pagecoros.com/apex4Read 15 October 2026Overview: 51 g (46 mm) and 44 g (42 mm) with the nylon band.

61g(2.2 oz)1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026General > Weight: 61 g for the 43 mm watch with the supplied silicone band.

Durability

6 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 pagecoros.com/apex4/specsRead 15 October 2026Durability: 5 ATM, suitable for surface water activities and not for diving. The buy page calls it WR50 certified.

10ATM1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Watch water rating 10 ATM.5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Specifications: water rating 10 ATM. The device withstands pressure equivalent to a depth of 100 m.

Water resistance standard

Not available

Not available

Dust and water rating

Not available

Not available

Dive rating

Not available

4 ATM Dive (EN 13319)5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Specifications, printed page 142: 4 ATM Dive (EN 13319), designed to comply with CSN EN 13319. The 10 ATM static rating is separate.

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

Not available

40m1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Diving Features > Dive activity maximum operating depth 40 meters (single-gas and APNEA).

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

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Feature text: tested to U.S. military standards for thermal, shock and water resistance. The standard is not named MIL-STD-810 on this page. Stored as true to match the fēnix 8 file.4Maker product pagegarmin.com.sg/products/wearables/fenix-9-43-fog-grayRead 14 October 2026

MIL-STD-810 tests

Not available

thermal, shock, water resistance1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Feature text: thermal, shock and water resistance.4Maker product pagegarmin.com.sg/products/wearables/fenix-9-43-fog-grayRead 14 October 2026

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/apex4/specsRead 15 October 2026Durability: working temperature -4 F to 122 F (-20 C to 50 C). Storage temperature -20 C to 60 C is not stored.

Min-20Max45°C5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Specifications, printed page 142: operating and storage range -20 to 45 C. The charging range of 0 to 45 C is not used.

Display

6 of 14 differ

Display type

MIP1Maker product pagecoros.com/apex4/specsRead 15 October 2026Display: 3rd Generation Memory-in-Pixel touch screen.

OLED1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Display type (as published)

3rd Generation Memory-in-Pixel touch screen1Maker product pagecoros.com/apex4/specsRead 15 October 2026Display, Display Type verbatim.

AMOLED1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Watch display type: 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.

1.2in(3 cm)1Maker product pagecoros.com/apex4/specsRead 15 October 2026Display Size: 1.2 inches on the 42 mm and 1.3 inches on the 46 mm.

1.3in(3.3 cm)1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Display Size 1.3 in (33.0 mm) diameter for the 43 mm watch.

Resolution

240 × 240px1Maker product pagecoros.com/apex4/specsRead 15 October 2026Display Resolution: 240 x 240 on the 42 mm and 260 x 260 on the 46 mm.

416 × 416px1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Display resolution 416 x 416 pixels for the 43 mm watch.

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

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Display Type says touch screen. The feature list names Touch Scroll.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

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

2,000nits8Reviewdcrainmaker.com/2026/09/garmin-fenix9-series-pro-inreach-solar-in-depth-review.htmlRead 14 October 2026What's New lists display brightness raised to 2,000 nits on the base model series and 3,000 nits on the Pro series. Garmin's own pages give no nit value for the base model. Peak claim, not a measurement.9Spec databasethe5krunner.com/specs/garmin/fenix-9Read 14 October 2026Lists AMOLED at about 2,000 nits, in agreement with DC Rainmaker.

Minimum brightness

Not available

Not available

Always-on display

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Daily Features list Always-On Display. The overview calls it a 3rd generation always-on MIP display.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026The manual says the Always On Display option is available on fēnix 9/9 Pro AMOLED models.5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Display settings: Always On Display option, available on fēnix 9/9 Pro AMOLED models only.

Display cover

Sapphire1Maker product pagecoros.com/apex4/specsRead 15 October 2026Materials: Screen Material Sapphire Glass.

Sapphire1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Display cover (as published)

Sapphire Glass1Maker product pagecoros.com/apex4/specsRead 15 October 2026Materials: Screen Material Sapphire Glass.

Sapphire crystal1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026General > Lens material: sapphire crystal.

Platform

3 of 15 differ

Platform

Proprietary1Maker product pagecoros.com/apex4/specsRead 15 October 2026COROS own firmware, updated through Wi-Fi and the COROS app. No Wear OS, watchOS or HarmonyOS.

Proprietary1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Garmin's own watch software. Connect IQ is the app store. No Wear OS, watchOS or HarmonyOS.

OS at launch

Not available

Not available

Software

Not available

Not available

Latest OS

Not available

Not available

Works with

Not available

iOS, Android1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Phone requirement

Not available

Not available

App store

No18Reviewoutdoorgearlab.com/reviews/camping-and-hiking/gps-watch/coros-apex-4Read 15 October 2026The review says the watch has no third-party apps and no contactless payments.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Voice assistants

Not available

Voice Commands, Phone Assistant1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 20265Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Voice Commands run on the watch. The Phone Assistant uses the paired phone.

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

1 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.

32GB1Maker product pagecoros.com/apex4/specsRead 15 October 2026Memory: internal memory 32 GB, with room for 1200 hours of activity data (estimate based on outdoor activities).

64GB1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026General > Memory/History 64 GB, nominal.

Health sensors

3 of 8 differ

Heart rate sensor

Optical heart rate monitor1Maker product pagecoros.com/apex4/specsRead 15 October 2026Data Tracking: Optical Heart Rate Monitor (may not work over tattoos). The sensor generation is not named.

Garmin Elevate Gen 51Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Spec table names the Garmin Elevate wrist heart rate monitor. The Gen 5 name comes from DC Rainmaker.8Reviewdcrainmaker.com/2026/09/garmin-fenix9-series-pro-inreach-solar-in-depth-review.htmlRead 14 October 2026The fēnix 9 series uses Garmin's Elevate Gen5 optical heart rate sensor.

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

Not available

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Garmin ECG app is listed. The ECG app needs an eligible country and a compatible phone, and is not for users under 22.

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

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Data Tracking: Optical Pulse Oximeter.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Pulse Ox blood oxygen saturation monitor. 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

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Health & Wellness Monitoring lists skin temperature.

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

3 of 9 differ

Accelerometer

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Data Tracking: Accelerometer.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Data Tracking: Gyroscope.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Barometric altimeter

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Data Tracking: Barometric Altimeter. The overview names a dual-range barometer.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Compass

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Data Tracking: 3D Compass.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Ambient light sensor

Not available

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Depth gauge

Not available

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

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

Not available

40m1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Water temperature sensor

Not available

Not available

Health and fitness

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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/apex4/specsRead 15 October 2026Daily Features: Daily Stress, Sleep (with REM tracking), HRV, Wellness Check. Data Tracking: Optical Pulse Oximeter. Continuous heart rate is not stored because the page does not state it. The Electrical Heart Rate Sensor is for HRV and wellness checks, so no ECG is stored.7Owner's manualsupport.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4Read 15 October 2026Sleep and Wellness Features: sleep and nap tracking, overnight HRV and wellness checks. Control Center has an Oximeter for SpO2 readings.

Continuous heart rate, Heart rate alerts, ECG app, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score, Cycle tracking, Temperature-based ovulation1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Heart rate every second, abnormal heart rate alerts, ECG app, Pulse Ox, HRV status, sleep score and sleep stages, all-day stress, training readiness, women's health with past ovulation estimates and skin temperature. Breathing variations during sleep are not medically certified sleep apnea notifications, so that option is not stored.

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, Pool swim, Open water swim, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback1Maker product pagecoros.com/apex4/specsRead 15 October 2026Training Features: EvoLab with recovery, fatigue, training load and VO2 max, Basic Interval Training, Training Plans. Navigation: Landscape and Topo map layers, turn-by-turn directions and Back-To-Start. Supported Activity Modes list Open Water and Pool Swim. Running dynamics need a COROS POD, so they are not stored.13Maker product pagecoros.com/stories/latest-news/c/get-more-from-navigationRead 15 October 2026COROS blog: Back to Start uses the GPS points logged during the activity and guides you back along the same path. The spec page lists Back-To-Start for the APEX 4 and the Using Navigation Features article lists the APEX 4.

VO2 max, Training load, Recovery advice, Running dynamics, Running power, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback, Climb detection, Golf courses, Ski resort maps1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Spec table lists VO2 max, training load, recovery time, running dynamics, running power, open-water and pool swim metrics, automatic rep counting, improved intervals, courses with turn-by-turn directions, TracBack, trail-run auto climb and ClimbPro, 43,000 preloaded golf courses and preloaded ski resort maps. Move IQ is listed without a description, so auto workout detection is not stored. More than 100 activity profiles is not an exact count.

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

Snorkel, Scuba, single gas, Freedive1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Single-gas and APNEA modes are listed with a Bühlmann ZHL-16c model. Snorkeling is a separate activity profile, stored as in the fēnix 9 Pro file.

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 meter1Maker product pagecoros.com/apex4/specsRead 15 October 2026Connectivity: accessories over Bluetooth. Training Features: Running Form Test requires COROS POD or POD 2. The buy page FAQ names BLE heart rate monitors and cycling power. No other sensor types are stated.4Maker product pagecoros.com/buy/apex4Read 15 October 2026FAQ: external sensors over BLE for HRM, cycling power and more.7Owner's manualsupport.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4Read 15 October 2026The guide names no sensor types.

Heart rate strap, Power meter, Speed and cadence, Foot pod, Smart trainer1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Spec table lists compatible HRM accessories, power meters, speed and cadence sensors, foot pod capability and smart trainer control. Metrics that need an accessory are not built-in sensors.

Safety

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

Not available

Not available

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.

Yes10Maker product pagesupport.coros.com/hc/en-us/articles/25514157012116-Safety-AlertsRead 15 October 2026The APEX 4 is on the device list. Press and hold the dial for 7 seconds, then press once to confirm. Preset contacts (up to 3) get a text with a live location link. Needs the paired phone with cell service. It does not contact local emergency services.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026The Assistance feature sends a message with a live location link to preset contacts through the paired phone. It does not call emergency services.5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Requesting Assistance, printed page 126: on a watch without an inReach plan the watch sends an assistance message to preset contacts through the paired phone with a data plan.

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.

Yes11Maker product pagesupport.coros.com/hc/en-us/articles/51716258730772-How-to-Use-Live-TrackingRead 15 October 2026The APEX 4 is on the device list. Live Tracking works for outdoor activities and needs the phone connected with the COROS app running.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Safety and tracking features list Live Event Sharing and LiveTrack through the paired phone.5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026LiveTrack sends a web link to friends and family through the Garmin Connect app.

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

Not available

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Positioning

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

GPS, GLONASS, Galileo, BeiDou, QZSS1Maker product pagecoros.com/apex4/specsRead 15 October 2026Geo Location, Satellite Systems: GPS, GLONASS, Galileo, Beidou, QZSS.

GPS, GLONASS, Galileo, QZSS, BeiDou1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Sensors list GPS, GLONASS, Galileo, QZSS and BeiDou with SatIQ. Frequency bands per system are not listed.

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

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Geo Location: GNSS chipset All-Satellite Dual-Frequency.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Feature list names multi-band GPS.

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

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Navigation: map layers Landscape and Topo as downloadable global maps. The setup guide downloads maps to the watch through Map Manager.7Owner's manualsupport.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4Read 15 October 2026Maps and Navigation: download global landscape and topographic maps to the watch in the COROS app Map Manager.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Built-in mapping with preloaded road and trail maps, downloadable cartography and Wi-Fi map downloads.

Connectivity

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

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Connectivity: phone and accessories connect over Bluetooth.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Connectivity row lists Bluetooth, ANT+ and Wi-Fi. No Bluetooth version is published.

Bluetooth version

5.416Regulatory filingfccid.co/api/files/s2/fccids/2BBGF-W542/files/4fa28337_SAR_report.pdfRead 15 October 2026Test report CTB25071300230RH04 (W542, issued 2025-08-23): Bluetooth Version 5.4, with BLE and EDR.

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/apex4/specsRead 15 October 2026Connectivity: data sync over Wi-Fi and the COROS app.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Connectivity row lists Wi-Fi. No Wi-Fi standard is published.

Wi-Fi standard

Wi-Fi 616Regulatory filingfccid.co/api/files/s2/fccids/2BBGF-W542/files/4fa28337_SAR_report.pdfRead 15 October 2026Same report: Wi-Fi specification 2.4G IEEE 802.11b/g/n/ax, so Wi-Fi 6 on 2.4 GHz.

Not available

Wi-Fi bands

2.4 GHz16Regulatory filingfccid.co/api/files/s2/fccids/2BBGF-W542/files/4fa28337_SAR_report.pdfRead 15 October 2026Same report: Wi-Fi 2412-2462 MHz, 11 channels. No 5 GHz band is listed.

2.4 GHz5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Specifications > wireless frequencies for fēnix 9/9 Pro list only 2400-2483.5 MHz and 13.56 MHz. The 2.4 GHz band is therefore the only Wi-Fi band. No 5 GHz radio is listed. The Wi-Fi standard is not published.

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

No1Maker product pagecoros.com/apex4/specsRead 15 October 2026Connectivity lists Bluetooth and Wi-Fi only. No cellular radio is listed.

No1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026No LTE or inReach hardware on the base fēnix 9. The manual limits LTE and satellite features to the fēnix 9 Pro - inReach.5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026The manual limits LTE connected features to the fēnix 9 Pro - inReach.

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.

No17Spec databasethe5krunner.com/specs/coros/apex-4Read 15 October 2026NFC: No. The maker's FAQ says payment is not supported.

Yes5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Wireless frequencies list 13.56 MHz, used for Garmin Pay.

Contactless payments

No4Maker product pagecoros.com/buy/apex4Read 15 October 2026FAQ: Payment is not supported.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Garmin Pay contactless payments.

Payment services

Not available

Garmin Pay1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Ultra-wideband

Not available

Not available

Satellite

None1Maker product pagecoros.com/apex4/specsRead 15 October 2026Connectivity lists Bluetooth and Wi-Fi only. No satellite link is listed.

None1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026No satellite features on the base fēnix 9. The manual limits satellite features to the fēnix 9 Pro - inReach.5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026The manual limits satellite features to the fēnix 9 Pro - inReach.

ANT+

No1Maker product pagecoros.com/apex4/specsRead 15 October 2026Connectivity: accessories over Bluetooth. ANT+ is not listed.17Spec databasethe5krunner.com/specs/coros/apex-4Read 15 October 2026ANT+: No.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Audio

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Speaker

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Data Tracking: speaker to take hands-free calls or play activity alerts out loud.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Built-in speaker/microphone.

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 only1Maker product pagecoros.com/apex4/specsRead 15 October 2026Speaker to take hands-free calls. The watch has no cellular radio, so calls go through the paired phone. Daily Features: Message/Call Alert.

Phone only1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Bluetooth phone calling and voice assistant support. Calls use the paired phone. Messenger voice calls need the Pro.5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Calling from the Phone App, printed page 97, needs a paired phone. Messenger calls are Pro-only.

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

Yes1Maker product pagecoros.com/apex4/specsRead 15 October 2026Daily Features: Music, plays offline music when paired with supported Bluetooth headsets.4Maker product pagecoros.com/buy/apex4Read 15 October 2026FAQ: offline MP3 music is available directly from the watch.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Plays and controls watch music. 64 GB holds up to 7,000 songs from Spotify or Deezer, subscription may be required.

Controls

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

21Maker product pagecoros.com/apex4/specsRead 15 October 2026Design lists Digital Dial, Back Button and Action Button. The dial is a rotating control and is not counted in the two buttons.7Owner's manualsupport.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4Read 15 October 2026Operating APEX 4 lists the dial, the Back/Lap button and the Action button.

55Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Button Functions, printed page 6 and 7: five physical buttons, no rotating crown.

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

Back/Lap Button, Action Button1Maker product pagecoros.com/apex4/specsRead 15 October 2026Design: Back Button and Action Button.7Owner's manualsupport.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4Read 15 October 2026Operating APEX 4: Digital Dial (top right), Back/Lap Button (bottom right) and Action Button (bottom left).

Upper-left button, Middle-left button, Lower-left button, Upper-right button, Lower-right button5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Button Functions: Upper-left, Middle-left, Lower-left, Upper-right and Lower-right buttons. Band-release latches are not counted.

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

Rotating1Maker product pagecoros.com/apex4/specsRead 15 October 2026Design: Digital Dial. The setup guide says to scroll the dial to move the selection and press to confirm. No haptic claim.7Owner's manualsupport.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4Read 15 October 2026Digital Dial: scroll to move the selection, press to confirm.

None5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026The button overview shows only push buttons.

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

Not available

None5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026The button overview shows no rotating bezel.

Gestures

Not available

Not available

Battery and charging

3 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 APEX 4

Mode	With solar	Hours (h)
Smartwatch	No	360
GPS, automatic system selection	No	41
GPS, automatic system selection with music	No	11
GPS, all systems	No	34
GPS, all systems with music	No	10
GPS, dual-band	No	26
GPS, dual-band with music	No	9

Source1Maker product pagecoros.com/apex4/specsRead 15 October 2026Battery table. 42 mm: Endurance All Systems 41 h (11 h with offline music), All Systems On 34 h (10 h), Dual Frequency 26 h (9 h), Daily Use 15 days. 46 mm: Endurance 65 h (17 h), All Systems On 53 h (16 h), Dual Frequency 41 h (15 h), Daily Use 24 days. Days are converted to hours exactly. The Battery Specifications article names the daily use row as sleep tracking plus daily stress. The setup guide says the Endurance preset picks satellite systems intelligently, so it is stored as GPS automatic system selection. Always-on display use in these figures is not stated. The standard GPS row is empty.3Maker product pagecoros.com/apex4Read 15 October 2026Overview: up to 65 hours of All Systems GPS on the 46 mm or 41 hours on the 42 mm, marked as Endurance Satellite Mode. Matches the spec table.9Maker product pagesupport.coros.com/hc/en-us/articles/23476623096980-Battery-SpecificationsRead 15 October 2026APEX 4 (42) table: Endurance 41 h, All Systems On / High 34 h, Dual Frequency / Max 26 h, daily use with sleep tracking and daily stress 15 days. APEX 4 (46): Endurance 65 h, All Systems 53 h, Dual Frequency 41 h, daily use 24 days. Same figures as the spec page. Actual use can be higher with backlight, navigation and accessories.

BGarmin fēnix 9

Mode	With solar	Hours (h)
Smartwatch	No	240
Low power	No	360
GPS, automatic system selection	No	18
GPS, automatic system selection with music	No	7
GPS, dual-band	No	15
Max battery GPS	No	49
Extended GPS workout	No	22
Expedition	No	240

Source1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 202643 mm column of the battery table, also on this page. Days converted to hours. Normal or Balanced activity mode is stored as automatic system selection because the manual says every satellite mode uses SatIQ to select systems dynamically. Max Accuracy is stored as dual-band because DC Rainmaker says it forces multi-band on. Max Battery, Extended and Expedition follow the maker names. Low-power is the maker's low power watch mode.5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 October 2026Battery Information, printed page 142: table for fēnix 9 with 43, 47 and 51 mm columns. Satellite Settings and Activity Power Mode Settings describe the modes.

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

240h=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.

Proprietary plug7Owner's manualsupport.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4Read 15 October 2026Charging APEX 4: metal pins on the A2 adapter fit into the charging port on the back of the watch and snap into place. A standard USB-C cable connects to the adapter.8Owner's manualsupport.coros.com/hc/en-us/articles/41966405480340Read 15 October 2026Charging Your APEX 4: the adapter pins fit into the port on the back and the adapter takes any standard USB-C cable. Charging works during an activity.

Proprietary plug1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Charging method: Garmin proprietary plug charger. USB at the other end of the cable is not the watch port.

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

The COROS A2 charging adapter clips onto the pins on the back of the watch and takes any standard USB-C cable. COROS asks for an LPS-certified charger and official accessories only. It says not to use a battery pack with quick-charge capability. The store FAQ says 0 to 100% in under 2 hours.4Maker product pagecoros.com/buy/apex4Read 15 October 2026FAQ: 0 to 100% in under 2 hours. The box note says the USB-C charging cable is not included.8Owner's manualsupport.coros.com/hc/en-us/articles/41966405480340Read 15 October 2026Use an LPS-certified charger. Use official accessories only. Do not use a power bank with quick-charge capability.

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.

Not available

Not available

Measured

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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.

101min18Reviewoutdoorgearlab.com/reviews/camping-and-hiking/gps-watch/coros-apex-4Read 15 October 2026The review reports about 101 minutes from empty to full with the USB-C charging adapter on the 46 mm model tested. The charger and power source are not stated. The claim is under 2 hours.

Not available

Strap

5 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/apex4/specsRead 15 October 2026Strap: width 22 mm on the 42 mm case and 24 mm on the 46 mm case.

20mm1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026QuickFit watch band compatible: included (20 mm) for the 43 mm watch.

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/apex4/specsRead 15 October 2026Strap: installation type Quick Release.

Yes1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026QuickFit watch band compatible: included.

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

Quick release, 22 mm on the 42 mm case and 24 mm on the 46 mm case1Maker product pagecoros.com/apex4/specsRead 15 October 2026Strap: width 22 mm (42 mm) and 24 mm (46 mm), installation type Quick Release.

QuickFit: 20 mm on the 43 mm case, 22 mm on the 47 mm case, 26 mm on the 51 mm case1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026QuickFit width per case size from each size page: 20 mm (43), 22 mm (47), 26 mm (51).

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

Not available

Silicone1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Strap

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Fog Gray Silicone Band1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Variation name of the supplied silicone band for the SKU, from the store product name.

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 APEX 4

Size	Wrist (min) (mm)	Wrist (max) (mm)
Nylon and silicone	135	205

Source1Maker product pagecoros.com/apex4/specsRead 15 October 2026Strap: 135-205 mm for silicone and nylon on the 42 mm. 140-215 mm for both on the 46 mm. The spec page lists size ranges per strap material with the same numbers.

BGarmin fēnix 9

Size	Wrist (min) (mm)	Wrist (max) (mm)
Silicone band	108	182

Source1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Fits wrists with the silicone band: 108-182 mm for the 43 mm watch.

Regulatory

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FCC ID

2BBGF-W542, 2BBGF-W54114Regulatory filingfccid.co/fcc/2BBGF-W542Read 15 October 2026FCC ID 2BBGF-W542 is COROS APEX 4 42mm, grant date Nov 28, 2025. Read on a public mirror of the FCC filing.15Regulatory filingfccid.co/fcc/2BBGF-W541Read 15 October 2026FCC ID 2BBGF-W541 is COROS APEX 4 46mm, grant date Nov 27, 2025.

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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.

0.48W/kg16Regulatory filingfccid.co/api/files/s2/fccids/2BBGF-W542/files/4fa28337_SAR_report.pdfRead 15 October 2026Same report, W542 (42 mm): maximum reported 10 g wrist-worn SAR 0.48 W/kg at 0 mm (Wi-Fi 2.4 GHz). Limit 4.0 W/kg. The 46 mm W541 report (CTB25071300229RH04) gives 0.52 W/kg. US regime.

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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.

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Other certifications

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In the box

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In the box

COROS APEX 4 GPS Watch, COROS A2 Charging Adapter7Owner's manualsupport.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4Read 15 October 2026What's In the Box: COROS APEX 4 GPS Watch and COROS A2 Charging Adapter. The buy page says no USB-C cable is included.

fēnix 9 smartwatch, Charging/data cable, Documentation1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026Complete In the Box list. No mains or USB power adapter.

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

No7Owner's manualsupport.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4Read 15 October 2026The box has the A2 adapter and no USB-C cable or power adapter.

No1Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026In the Box has a charging/data cable and documentation, no power adapter.

Links

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Product page

coros.com/apex43Maker product pagecoros.com/apex4Read 15 October 2026The maker's product overview page.

www.garmin.com/en-US/p/2021177/pn/010-04761-001Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Spec sheet

coros.com/apex4/specs1Maker product pagecoros.com/apex4/specsRead 15 October 2026The maker's technical specifications page.

www.garmin.com/en-US/p/2021177/pn/010-04761-001Maker product pagegarmin.com/en-US/p/2021177/pn/010-04761-00Read 14 October 2026

Manual

support.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-47Owner's manualsupport.coros.com/hc/en-us/articles/42070715941268-Set-Up-Your-COROS-APEX-4Read 15 October 2026Setup guide for the APEX 4, last edited 2026-10-14. COROS publishes no separate PDF manual.

www8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdf5Owner's manualwww8.garmin.com/manuals/webhelp/GUID-708A8F4D-9A78-49CF-9528-DE109BBCC472/EN-US/fenix_9_Series_OM_EN-US.pdfRead 14 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.

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Warranty

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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.

2years12Maker product pagesupport.coros.com/hc/en-us/articles/360039803532-COROS-Warranty-PolicyRead 15 October 2026COROS offers a 2-year warranty from the original activation date for watches. Straps have 180 days. Local consumer law rights may differ.

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