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Wearable comparison

Apple Watch Ultra vs Amazfit T-Rex Ultra 2

Compare battery life, health tracking, display and fit.

Compared products
01Selected
Apple Watch Ultra

Apple Watch Ultra

  • 61.3 g.
  • Screen: 410 × 502 pixels; 326 ppi; 1,185 mm² display area.
  • Apple S8 SiP processor.
  • 32 GB storage in this version.
  • Runs watchOS 9.0, upgradable to watchOS 26.6.
KSh 90,000In Stock
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02
Amazfit T-Rex Ultra 2

Amazfit T-Rex Ultra 2

  • 89.2 g.
  • Screen: 480 × 480 pixels, 322 ppi.
  • Wi-Fi 4 support.
  • 870 mAh battery capacity.
  • Up to 64 GB storage.
KSh 85,000Out of Stock

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2 spaces available

Apple Watch Ultra 3KSh 90,000
Apple Watch Series 11KSh 51,000
Apple Watch Series 12 42mmKSh 64,000
Apple Watch Ultra 4 49mmKSh 118,000
Apple Watch Series 12 46mmKSh 70,000
Apple Watch Series 8KSh 50,000
Apple Watch Ultra 2KSh 103,500
2 of 4 products

Our quick verdict

The Apple Watch Ultra runs watchOS built around the iPhone, takes ECG heart-rhythm readings, is lighter to wear all day and has a premium titanium build with a ceramic back, though it works only with an iPhone, while the Amazfit T-Rex Ultra 2 lasts much longer between charges (30 days vs 36 hours), works with Android phones and iPhones and gives daily recovery and BioCharge scores.

Weight

Apple Watch Ultra
61.3 g
Amazfit T-Rex Ultra 2
89.2 g

Display

Apple Watch Ultra
410 × 502 pixels; 326 ppi; 1,185 mm² display area
Amazfit T-Rex Ultra 2
480 × 480 pixels, 322 ppi

Battery life

Apple Watch Ultra
Up to 36 hours per charge
Amazfit T-Rex Ultra 2
870 mAh battery

Storage

Apple Watch Ultra
32 GB storage
Amazfit T-Rex Ultra 2
Up to 64 GB storage

Software

Apple Watch Ultra
WatchOS 9.0
Amazfit T-Rex Ultra 2
Works with the Zepp app

Key differences

The main differences to help you choose.

Apple Watch Ultra

  • Lighter: 61.3 g (vs 89.2 g).
  • ECG heart-rhythm readings.
  • Titanium case and ceramic back (vs plastic case).
  • Slimmer: 12 mm thick (vs 14.3 mm).
  • Dual-band Wi-Fi (vs 2.4 GHz only).

Amazfit T-Rex Ultra 2

  • Longer battery life: up to 30 days (vs 36 hours).
  • Brighter display: up to 3,000 nits (vs 2,000).
  • Works with Android phones and iPhones.
  • Daily recovery and BioCharge scores.
  • Rated for free diving to 45 m (vs 40 m).

What matters most to you?

Choose any priorities

How each product answers the questions buyers ask most. Tick a topic to add it, untick one to hide it.

6 priorities selected.
How each product answers the selected priorities
PriorityApple Watch UltraAmazfit T-Rex Ultra 2
Battery lifeUp to 36 hours per charge870 mAh battery
Storage32 GB storageUp to 64 GB storage
DisplayOLED display, 326 ppi1.5-inch OLED display, 322 ppi
SoftwarewatchOS 9.0Works with the Zepp app
ConnectionsWi-Fi 4, Bluetooth 5.3Wi-Fi 4, Bluetooth 5.2
Water resistance100 m under ISO 22810:201010 ATM

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationApple Watch UltraAmazfit T-Rex Ultra 2
DisplayAlways-On Retina LTPO2 OLED1.5-inch AMOLED
Screen resolution410 × 502 pixels; 326 ppi; 1,185 mm² display area480 × 480 pixels, 322 ppi
Display protectionFlat sapphire crystalSapphire glass
Display features2000 nits (peak)Up to 3,000 nits peak brightness; Always-On Display

Connectivity

Connectivity specifications comparison
SpecificationApple Watch UltraAmazfit T-Rex Ultra 2
Network / cellularGSM / HSPA / LTE—
SIM / eSIMeSIM—
Wi-FiWi-Fi 802.11 b/g/n, dual-band2.4 GHz Wi-Fi (802.11 b/g/n)
Bluetooth5.3, A2DP, LEBluetooth 5.2 and BLE
NFCSupported; Apple Pay—
Positioning / GNSSGPS (L1+L5), GLONASS, GALILEO, BDSBuilt-in dual-band positioning; six satellite positioning systems; circularly polarised GPS antenna
Ultra Wideband (UWB)Ultra Wideband (UWB) support—

Identity & design

Identity & design specifications comparison
SpecificationApple Watch UltraAmazfit T-Rex Ultra 2
BrandAppleAmazfit
ModelApple Watch UltraAmazfit T-Rex Ultra 2
Announced2022, September 07—
Dimensions49 × 44 × 12 mm51 × 51 × 14.3 mm, excluding heart-rate sensor base
Weight61.3 g (2.15 oz)89.2 g with strap
Build materialsTitanium case; sapphire crystal front; ceramic and sapphire crystal backFibre-reinforced polymer case; Grade 5 titanium bezel, buttons and back panel
Wrist size130–210 mm145–215 mm
Controls / buttonsCustomizable Action button; Digital Crown with haptic feedback; side buttonFour physical buttons; sapphire-glass touchscreen
Strap / band—26 mm silicone strap with classic pin buckle

Performance & software

Performance & software specifications comparison
SpecificationApple Watch UltraAmazfit T-Rex Ultra 2
ProcessorApple S8 SiP—
CPU64-bit dual-core—
GPUPowerVR—
Storage32 GB64 GB total; 26.7 GB available
Operating systemwatchOS 9.0, upgradable to watchOS 26.6—

Audio & communication

Audio & communication specifications comparison
SpecificationApple Watch UltraAmazfit T-Rex Ultra 2
SpeakerDual speakers; sirenSupported
MicrophoneThree-microphone array with beamforming and wind-noise mitigationSupported
CallingCellular and Bluetooth calling; international emergency callingBluetooth calling and call/text notifications through a connected smartphone

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationApple Watch UltraAmazfit T-Rex Ultra 2
SensorsBlood oxygen sensor; electrical heart sensor; third-generation optical heart sensor; temperature sensor; depth gauge; water-temperature sensor; compass; always-on altimeter; high-g accelerometer; high-dynamic-range gyroscope; ambient light sensorBioTracker 6.0 PPG biometric sensor (5 photodiodes + 2 LEDs); accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient-light sensor; temperature sensor
Health & wellness featuresECG app; Blood Oxygen app where available; heart-rate notifications; irregular rhythm notifications; temperature sensing; cycle tracking24-hour heart-rate, blood-oxygen, stress and skin-temperature monitoring; one-tap measurement; HybridCharge, BioCharge and LifeLoad energy insights; VO₂ Max and health alerts
Sleep trackingSleep duration and sleep stagesSleep HRV; sleep quality; stages including REM; daytime naps; sleep schedule; breathing quality; sleep score; RestoreIQ recovery insights
Sports / workout modesWorkout app with running, cycling, swimming, multisport and other workout types187 sports modes; smart recognition of 25 strength-training movements and 8 sports movements; HYROX race and training modes
Training & outdoor featuresPrecision dual-frequency GPS; compass waypoints and Backtrack; running dynamicsZepp Coach; PeakBeats; lactate threshold, Training Stress Balance, Training Load and Training Effect; offline maps; on-watch route planning, automatic rerouting, POI search, turn-by-turn navigation; golf maps; external heart-rate, running-power and cycling sensors
Safety & emergency featuresEmergency SOS; international emergency calling; Fall Detection; Crash DetectionTwo-colour flashlight with SOS/Boost modes; storm, high-altitude blood-oxygen and route-deviation alerts
Diving / depth featuresRecreational scuba diving to 40 m; depth gauge; water-temperature sensorFreediving and recreational scuba-diving support to 45 m; EN13319:2000, ISO 6425:2018 and GB/T 18828-2022 diving certifications; Bühlmann ZHL-16C decompression model

Battery & durability

Battery & durability specifications comparison
SpecificationApple Watch UltraAmazfit T-Rex Ultra 2
Battery lifeUp to 36 hours normal useTypical use: up to 30 days; heavy use: 15 days; AOD: 10 days; accurate GPS: 50 h; power-saving GPS: 90 h; maximum GPS: 177 h; low-temperature mode with GPS: 40 h
ChargingMagnetic fast charging to USB-C cableMagnetic charging head; DC 5 V 1.5 A maximum input
Water resistance100 m under ISO 22810:201010 ATM; tested to ISO 22810:2010
Durability / certificationsIP6X dust resistance; MIL-STD-810H; EN13319MIL-STD-810H-2019; low-temperature operation down to −30 °C; SGS water-resistance test; certified diving standards
Battery capacity—870 mAh rated

Compatibility

Compatibility specifications comparison
SpecificationApple Watch UltraAmazfit T-Rex Ultra 2
Phone compatibilityiPhone 8 or later; iOS 16 or laterAndroid 7.0 or later; iOS 15.0 or later
Companion appApple Watch app on iPhoneZepp App
ColorsTitaniumBlack Magma

Additional specifications

Additional specifications specifications comparison
SpecificationApple Watch UltraAmazfit T-Rex Ultra 2
Case materialTitanium—
Military-grade resistanceMIL-STD-810H—
FlashlightSupported—
Pixels per inch326 ppi—
Peak brightnessUp to 2,000 nits—
Cover / touchscreenSupported—
Release statusAvailable. Released 2022, September 23—
Model numbersA2684, A2622, A2859, watch6,18—
Card slotNo—
CameraNo—
3.5 mm headphone jackNo—
USBNo—
RadioNo—
2G bandsGSM 850 / 900 / 1800 / 1900—
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International, China, HK; HSDPA 850 / 1700(AWS) / 1900 / 2100 - USA, LATAM, Canada—
4G bands1, 2, 3, 4, 5, 6, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41, 66 - International, China, HK; 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41, 66 - USA, LATAM, Canada—
Network speedHSPA, LTE—
SAR (EU)0.35 W/kg (head) 0.60 W/kg (body)—
Additional hardware featuresTemperature sensing (0.01˚ accuracy); Depth gauge (±1m accuracy)—
Battery typeRechargeable lithium-ion—

Similarities

  • Both support Wi-Fi 4.
  • Both work with a companion app.
  • Both take calls over Bluetooth.
  • Both have OLED displays.
  • Both connect over Bluetooth.

In summary

Get the Amazfit T-Rex Ultra 2 if you want much longer battery life and a choice of Android phone or iPhone, or the Apple Watch Ultra if you would rather have ECG heart-rhythm readings and a lighter watch for all-day wear.

Back to compared products ↑

In-stock alternatives

Apple Watch Ultra 3For Apple Watch UltraApple Watch Ultra 3View product ↗Apple Watch Ultra 2For Apple Watch UltraApple Watch Ultra 2View product ↗Apple Watch Series 12 46mmFor Amazfit T-Rex Ultra 2Apple Watch Series 12 46mmView product ↗Apple Watch Ultra 4 49mmFor Amazfit T-Rex Ultra 2Apple Watch Ultra 4 49mmView product ↗

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