Smartwatches / Compare

Apple Watch Ultra 4 vs Garmin fēnix 9

A

Product A: Apple

Watch Ultra 4

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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

AApple Watch Ultra 4

BGarmin fēnix 9

General

7 of 10 differ

Series

Apple Watch Ultra3Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026

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.

A3579, A35804Maker product pagesupport.apple.com/en-us/108056Read 8 October 2026Apple Watch Ultra4:49mm A3579 covers North America, Europe and Asia Pacific, including the Japanese review market. A3580 covers China mainland. No Chinese regional test is claimed.

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.

9 September 20263Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026

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

Available5Maker product pageapple.com/shop/buy-watch/apple-watch-ultraRead 30 September 2026

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.

Apple Watch Ultra 314Reviewtechradar.com/health-fitness/smartwatches/apple-watch-ultra-4-vs-apple-watch-ultra-3-whats-changed-and-should-you-upgradeRead 23 October 2026TechRadar calls the Apple Watch Ultra 3 the previous gen of the Apple Watch Ultra 4.15Press articlemacrumors.com/2026/09/16/apple-watch-ultra-3-vs-ultra-4Read 23 October 2026MacRumors says the Apple Watch Ultra 4 improves on its predecessor and notes the Ultra 3 launched last year.

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.

$7993Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026Pricing and Availability: starting US launch price.

$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.

€89911Press releaseimages.apple.com/de/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026Pricing and Availability: starting EUR price including German VAT.

€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.

AU, CA, FR, DE, IN, JP, AE, GB, US, CN3Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026Pre-order in Australia, Canada, France, Germany, India, Japan, the UAE, the UK, the U.S. and more than 50 other countries. CN from the China mainland model number

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

Natural, Black1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Outdoor3Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026Apple calls it the ultimate sports and adventure watch

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

8 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.

49mm1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Rectangular1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Rounded rectangular outline observed in the model-labeled In the Box manufacturer illustration. Geometry classification only, not a size or material inference.

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.

Titanium1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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)

Titanium case, Grade 51Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

Ceramic back4Maker product pagesupport.apple.com/en-us/108056Read 8 October 2026Sapphire crystal, Retina display, and ceramic back

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.

Height49Width44Thickness12mm(1.9 × 1.7 × 0.5 in)1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

63g(2.2 oz)1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Case weight. Natural 63.0 grams, black 63.1 grams

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.

Not available

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

5 of 8 differ

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

10ATM1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Published as water resistance 100m under ISO 22810:2010. 100 m is 10 ATM

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

ISO 22810:20101Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Durability and footnotes.

Not available

Dust and water rating

IP6X1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

Dive rating

EN 133191Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026EN13319 recreational scuba diving to 40m (±1m accuracy)

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.

40m1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Tested to MIL-STD 810H

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

altitude, high temperature, low temperature, temperature shock, immersion, freeze with thaw, ice and freezing rain, shock and vibration1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

Min0Max35°C1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Environmental Requirements > Operating temperature: 0 to 35 C. Separate on-wrist operating range is -20 to 55 C and dive operating range is 0 to 40 C.

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

10 of 14 differ

Display type

LTPO OLED1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Display type (as published)

Always-On Retina display with wide-angle OLEDs and LTPO31Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

1.98in(5 cm)7Spec databasegsmarena.com/apple_watch_ultra_4-14935.phpRead 30 September 20261.98 inches. DC Rainmaker's review also states 1.98 inch

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

422 × 514px1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

326ppi1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

Display area

1,245mm²1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

Touchscreen

Yes2Maker product pageapple.com/apple-watch-ultra-4Read 30 September 2026Tap gestures and touch-based controls on the display

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.

1Hz1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

3,000nits1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

1nit1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

Always-on display

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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 pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Display cover (as published)

Flat sapphire crystal1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Platform

8 of 15 differ

Platform

watchOS1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

watchOS 273Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026

Not available

Software

Not available

Not available

Latest OS

watchOS 27.0.112Maker product pagesupport.apple.com/en-us/100100Read 30 September 2026Get the latest software updates: latest watchOS is 27.0.1, expanded September 28. SE 3 eligibility is also explicitly confirmed in 9to5Mac September 28 coverage.

Not available

Works with

iOS5Maker product pageapple.com/shop/buy-watch/apple-watch-ultraRead 30 September 2026Apple Watch is only compatible with iPhone

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

Phone requirement

iPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 27 or later1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

App store

Yes9Owner's manualsupport.apple.com/en-gb/guide/watch/welcome/27/watchos/27Read 30 September 2026App Store section: install apps on Apple Watch.

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

Voice assistants

Siri1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Apple S111Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

Process

Not available

Not available

CPU cores

21Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026S11 chip with 64-bit dual-core processor

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.

4GB8Press articlemacrumors.com/2026/09/10/apple-watch-series-12-ultra-4-increased-ramRead 30 September 20264GB according to Apple's developer tool Xcode 27

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.

64GB1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Health sensors

2 of 8 differ

Heart rate sensor

Always-on optical heart sensor1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Sensors > Health Sensing System: exact optical sensor name. Electrical sensor generation is separate.

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.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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 pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

Hypertension notifications1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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 pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Published as High-g 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 pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Barometric altimeter

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Published as Always-on altimeter

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

Compass

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Ambient light sensor

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Depth gauge

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

40m1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Water temperature sensor

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

Health and fitness

4 of 5 differ

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

Continuous heart rate, Heart rate alerts, Irregular rhythm notifications, ECG app, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Sleep apnea notifications, Readiness score, Cycle tracking, Temperature-based ovulation, Hypertension notifications, Noise monitoring1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026temperature_based_ovulation from 'retrospective ovulation estimates' with the temperature sensor. readiness_score from the Readiness app

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, Running dynamics, Running power, Pool swim, Open water swim, Interval workouts, Route navigation, Trackback1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Maker confirms offline maps, custom routes and Backtrack, but the read spec does not explicitly establish turn-by-turn guidance. That unsupported feature member is removed.

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.

Power meter1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Bluetooth-compatible with power meters

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

4 of 6 differ

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

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

Car crash detection

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

Not available

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

1 of 3 differ

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

GPS (dual-frequency), Galileo, QZSS, BeiDou1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Published as Precision dual-frequency GPS (GPS, Galileo, QZSS, and BeiDou)

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 pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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 pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

13 of 15 differ

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

Not available

Yes1Maker product 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

5.31Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

Not available

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 41Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

Wi-Fi bands

2.4 GHz, 5 GHz1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

LTE, 5G1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

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

1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 71, 38, 39, 40, 41, 531Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026FDD-LTE 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 71. TDD-LTE 38, 39, 40, 41, 53. Model A3579

Not available

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

n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71, n38, n40, n41, n531Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026FDD-5G NR n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71. TDD-5G NR n38, n40, n41, n53. RedCap

Not available

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

Yes2Maker product pageapple.com/apple-watch-ultra-4Read 30 September 2026Apple Pay contactless payments

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

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Payment services

Apple Pay1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Ultra-wideband

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

Satellite

Emergency SOS, Messaging1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Satellite communications (Emergency SOS, Messages, Find My). Provided by Globalstar

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+

Not available

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

Audio

2 of 4 differ

Speaker

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Dual speakers

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

Microphones

31Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Hardware/Audio section identifies the microphone, or the three-microphone array for Ultra 4.

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.

Cellular or phone2Maker product pageapple.com/apple-watch-ultra-4Read 30 September 2026Text and talk over 5G without iPhone

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 pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

5 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.

21Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Action button and side button. Digital Crown not counted

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.

Action button, Side button1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026User control buttons only. Digital Crown and band-release buttons excluded.

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.

Rotating haptic1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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

Single tap, Double tap, Wrist flick1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

Battery and charging

8 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.

AApple Watch Ultra 4

Mode	With solar	Hours (h)
Smartwatch	No	50
Low power	No	84
GPS	No	18
Extended GPS workout	No	25
Max battery GPS	No	45

Source1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Power and Battery Life: normal workout 18 h, Extended Workout 25 h, Max Extended Workout 45 h. Footnote specifies outdoor run/walk/hike without iPhone and with HR on. These are not reviewer measurements.

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.

50h=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.

18h=CalculatedFrom Claimed battery life

Not available

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

Not available

Not available

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

Magnetic puck1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

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.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Not available

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

Charge time15 minUse time18 h1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Power and Battery Life: normal-use hours from a short charge. Sleep-only charging claim is a different workload.

Not available

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

45min1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Power and Battery Life, charge footnote: included fast charger cable, Apple 20W USB-C power adapter. Approximate maker time.

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.

75min10Maker product pageapple.com/uk/watch/batteryRead 30 September 2026Model-specific Charge section. Approximate claim, included fast charging cable with Apple 20W USB-C adapter. Series 12 says about one hour, SE 3 and Ultra 4 about 75 minutes.

Not available

Measured

1 of 4 differ

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

Not available

Not available

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

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.

105min13Reviewgigazine.net/gsc_news/en/20260927-apple-watch-ultra-4-reviewRead 8 October 2026Reviewer timed a 49 mm GPS+Cellular Ultra 4 in Japan from discharged 0% with the watch powered off to 100%, using the included charging cable and Apple 20 W USB-C power adapter. Published approximately 1 hour 45 minutes, exactly converted to 105 minutes with the approximate qualifier retained. Firmware, ambient temperature and optimized-charging settings are not stated. Asia-Pacific hardware is A3579 per Apple identification. This is an observed test sample, not the maker about 75 minute claim. Partial-discharge endurance observations in the review are excluded.

Not available

Strap

6 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.

Not available

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.

Not available

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.

Not available

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

Not available

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.

AApple Watch Ultra 4

Wrist (min) (mm)	Wrist (max) (mm)
130	210

Source1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Size and Weight: Fits stated wrist circumference. This is an overall case-compatible wrist range, not one supplied strap size. No maker size label is published.

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

None of 3 known

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

Not available

In the box

1 of 2 differ

In the box

Apple Watch Ultra 4, Band, Apple Watch Magnetic Fast Charger to USB-C Cable (1m)1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.

No1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026In the box lists only the charging cable

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

Not compared

Product page

www.apple.com/apple-watch-ultra-42Maker product pageapple.com/apple-watch-ultra-4Read 30 September 2026

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

www.apple.com/apple-watch-ultra-4/specs1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

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.apple.com/en-gb/guide/watch/welcome/27/watchos/279Owner's manualsupport.apple.com/en-gb/guide/watch/welcome/27/watchos/27Read 30 September 2026watchOS 27 user guide. Models covered include this watch.

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.

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.

1year6Maker product pageapple.com/legal/warranty/products/warranty-us.htmlRead 30 September 2026US: Apple One (1) Year Limited Warranty

Not available

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