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Wearable comparison

AmazFit T-Rex Ultra vs Apple Watch Series 10

Compare battery life, health tracking, display and fit.

Compared products
01Selected
AmazFit T-Rex Ultra

AmazFit T-Rex Ultra

  • Screen: 454 × 454 pixels, 326 ppi.
  • Runs Zepp OS 3.5.
  • 500 mAh battery capacity.
  • 2.3 GB storage.
  • Bluetooth 5.0.
KSh 47,000Out of Stock
02
Apple Watch Series 10

Apple Watch Series 10

  • Screen: 42mm: 374 × 446 pixels; 46mm: 416 × 496 pixels; 326 ppi.
  • Apple S10; 4-core Neural Engine processor.
  • 64 GB storage in this version.
  • Runs watchOS 11, upgradable to watchOS 27.
  • Wi-Fi 4 support.
KSh 47,000In Stock
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WHOOP Peak 5.0 SensorKSh 38,000
Amazfit T-Rex 3 ProKSh 55,000
Amazfit Balance 2KSh 39,000
Amazfit Balance 3KSh 48,000
Google Pixel Watch 4KSh 44,500
Samsung Galaxy Watch Ultra 2025KSh 44,000
Samsung Galaxy Watch UltraKSh 45,000
2 of 4 products

Our quick verdict

The Apple Watch Series 10 runs watchOS built around the iPhone, takes ECG heart-rhythm readings, is lighter to wear all day and has a brighter screen for outdoor use, though it works only with an iPhone, while the AmazFit T-Rex Ultra lasts much longer between charges (20 days vs 18 hours) and works with Android phones and iPhones.

Display

AmazFit T-Rex Ultra
454 × 454 pixels, 326 ppi
Apple Watch Series 10
42mm: 374 × 446 pixels; 46mm: 416 × 496 pixels; 326 ppi

Software

AmazFit T-Rex Ultra
Runs Zepp OS 3.5
Apple Watch Series 10
Runs watchOS 11, upgradable to watchOS 27

Battery life

AmazFit T-Rex Ultra
500 mAh battery
Apple Watch Series 10
Up to 18 hours per charge

Portability

AmazFit T-Rex Ultra
89 g
Apple Watch Series 10
30 g

Storage

AmazFit T-Rex Ultra
2.3 GB storage
Apple Watch Series 10
64 GB storage

Key differences

The main differences to help you choose.

AmazFit T-Rex Ultra

  • Longer battery life: up to 20 days (vs 18 hours).
  • Works with Android phones and iPhones.

Apple Watch Series 10

  • Brighter display: up to 2,000 nits (vs 1,000).
  • Lighter: 30 g (vs 89 g).
  • ECG heart-rhythm readings.
  • More storage: 64 GB (vs 2.3 GB).
  • Speaker.
  • Slimmer: 9.7 mm thick (vs 13.45 mm).

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
PriorityAmazFit T-Rex UltraApple Watch Series 10
Battery life500 mAh batteryUp to 18 hours per charge
Storage2.3 GB storage64 GB storage
Display1.39-inch OLED display, 326 ppiOLED display, 326 ppi
SoftwareZepp OS 3.5watchOS 11
ConnectionsBluetooth 5.0Wi-Fi 4, Bluetooth 5.3
Water resistance10 ATM50 m

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationAmazFit T-Rex UltraApple Watch Series 10
Display1.39-inch AMOLEDAlways-On Retina LTPO3 wide-angle OLED
Screen resolution454 × 454 pixels, 326 ppi42mm: 374 × 446 pixels; 46mm: 416 × 496 pixels; 326 ppi
Display protectionGlassIon-X glass (aluminum); sapphire crystal (titanium)
Display featuresUp to 1,000 nits; Always-On Display; 120+ watch faces2000 nits (peak); Wide-angle OLED

Connectivity

Connectivity specifications comparison
SpecificationAmazFit T-Rex UltraApple Watch Series 10
Wi-Fi2.4 GHz Wi-FiWi-Fi 802.11 b/g/n, dual-band
BluetoothBluetooth 5.0 BLE5.3, A2DP, LE
Positioning / GNSSBuilt-in dual-band L1/L5 positioning; six satellite systemsGPS, GLONASS, GALILEO, QZSS, BDS
Network / cellular—GSM / HSPA / LTE
SIM / eSIM—eSIM
NFC—Supported; Apple Pay
Ultra Wideband (UWB)—Ultra Wideband (UWB) support (gen2 chip)

Identity & design

Identity & design specifications comparison
SpecificationAmazFit T-Rex UltraApple Watch Series 10
BrandAmazfitApple
ModelAmazfit T-Rex UltraApple Watch Series 10
Dimensions47.3 × 47.3 × 13.45 mm, excluding heart-rate sensor base42mm: 42 × 36 × 9.7 mm; 46mm: 46 × 39 × 9.7 mm
Weight89 g without strap42mm: aluminum GPS 30.0 g, GPS + Cellular 29.3 g, titanium 34.4 g; 46mm: aluminum GPS 36.4 g, GPS + Cellular 35.3 g, titanium 41.7 g
Build materials316L stainless-steel bezel, back panel, bridge and buttons; polymer-alloy middle frameAluminum or titanium case
Wrist size140–205 mm42mm: 130–200 mm; 46mm: 140–245 mm
Strap / band22 mm silicone strap with classic pin buckle—
Controls / buttonsFour physical buttons; glass touchscreenDigital Crown with haptic feedback; side button
Announced—2024, September 09

Performance & software

Performance & software specifications comparison
SpecificationAmazFit T-Rex UltraApple Watch Series 10
StorageUp to 2.3 GB available for music64 GB
Operating systemZepp OS 3.5watchOS 11, upgradable to watchOS 27
Processor—Apple S10; 4-core Neural Engine
CPU—64-bit dual-core
GPU—PowerVR

Audio & communication

Audio & communication specifications comparison
SpecificationAmazFit T-Rex UltraApple Watch Series 10
SpeakerNo built-in speaker; audio through connected Bluetooth headphonesSupported
Microphone—Supported
Calling—Bluetooth calling; cellular calling on GPS + Cellular models

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationAmazFit T-Rex UltraApple Watch Series 10
SensorsBioTracker PPG biometric sensor with SpO₂; accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient-light sensorElectrical heart sensor; third-generation optical heart sensor; temperature sensor; compass; always-on altimeter; high-g accelerometer; high-dynamic-range gyroscope; ambient light sensor; depth gauge; water temperature sensor
Health & wellness features24-hour heart-rate, blood-oxygen and stress monitoring; one-tap measurement; PAI; breathing exercises; health alertsECG app; blood oxygen feature where available; high and low heart-rate notifications; irregular rhythm notifications; temperature sensing; cycle tracking
Sleep trackingSleep stages including REM; naps; sleep schedule; breathing quality; sleep scoreSleep duration and sleep stages
Sports / workout modes162 sports modes; smart recognition of 25 strength movements and 8 sports movements; freediving workoutsWorkout app with multiple workout types and automatic workout detection
Training & outdoor featuresOffline maps and route navigation; Zepp Coach; PeakBeats; Track Run; trajectory correction; Virtual Pacer; training templates and intervals; external heart-rate belt and cycling power meter; altitude, sun, moon and tide toolsTraining load; pace and heart-rate zones; compass waypoints and backtrack
Safety & emergency featuresStorm warnings; altitude blood-oxygen reminders; abnormal heart-rate, low-SpO₂ and high-stress alertsEmergency SOS; international emergency calling; Fall Detection; Crash Detection
Diving / depth featuresOutdoor and indoor freediving and spearfishing; depth and water-temperature data; rated to 30 m; EN13319 and ISO 6425 diving certificationsDepth gauge to 6 m; water-temperature sensor

Battery & durability

Battery & durability specifications comparison
SpecificationAmazFit T-Rex UltraApple Watch Series 10
Battery capacity500 mAh rated—
Battery lifeTypical: up to 20 days; saver: 25 days; clock: 50 days; heavy: 9 days; accuracy GPS: 28 h; automatic GPS: 46 h; power-saving GPS: 58 h; endurance GPS: 80 h; low-temperature GPS: 10 hUp to 18 hours normal use; 36 hours Low Power Mode
ChargingMagnetic charging base; approximately 2 hoursMagnetic fast charging
Water resistance10 ATM; ISO 22810:201050 m; swimproof
Durability / certificationsMud-resistant design; ultra-low-temperature mode down to −30 °C; SGS-certified 10 ATM testing; EN13319 and ISO 6425 diving certificationsIP6X dust resistance

Compatibility

Compatibility specifications comparison
SpecificationAmazFit T-Rex UltraApple Watch Series 10
Phone compatibilityAndroid 7.0 or later; iOS 12.0 or lateriPhone XS or later; iOS 18 or later
Companion appZepp AppApple Watch app on iPhone
ColorsAbyss Black; SaharaSlate, Gold, Natural

Additional specifications

Additional specifications specifications comparison
SpecificationAmazFit T-Rex UltraApple Watch Series 10
Pixels per inch—326 ppi
Peak brightness—Up to 2,000 nits peak; 1 nit minimum
Cover / touchscreen—Supported
Charging time—About 30 minutes to 80%
Release status—Available. Released 2024, September 20
Model numbers—A3001, A3002, A3003, A3206
Card slot—No
Camera—No
3.5 mm headphone jack—No
USB—No
Radio—No
2G bands—GSM 850 / 900 / 1800 / 1900
3G bands—HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International, China, HK; HSDPA 850 / 1700(AWS) / 1900 / 2100 - USA, LATAM, Canada
4G bands—1, 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 speed—HSPA, LTE
SAR (US)—1.08 W/kg (head)
SAR (EU)—0.26 W/kg (head) 0.83 W/kg (body)
Additional hardware features—Temperature sensing (0.01˚ accuracy); Media playback
Battery type—Rechargeable lithium-ion

Similarities

  • Both work with a companion app.
  • Both have OLED displays.
  • Both connect over Bluetooth.

In summary

Get the Apple Watch Series 10 if you want ECG heart-rhythm readings and a lighter watch for all-day wear, or the AmazFit T-Rex Ultra if you would rather have much longer battery life and a choice of Android phone or iPhone.

Back to compared products ↑

In-stock alternatives

Amazfit Balance 3For AmazFit T-Rex UltraAmazfit Balance 3View product ↗Samsung Galaxy Watch UltraFor AmazFit T-Rex UltraSamsung Galaxy Watch UltraView product ↗Apple Watch Series 9For Apple Watch Series 10Apple Watch Series 9View product ↗

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