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Wearable comparison

Amazfit T-Rex Ultra 2 vs Apple Watch Series 12 46mm

Compare battery life, health tracking, display and fit.

Compared products
01Selected
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
02
Apple Watch Series 12 46mm

Apple Watch Series 12 46mm

  • Apple S11 chip; 4-core Neural Engine processor.
  • 64 GB storage in this version.
  • Runs watchOS 27.
  • Wi-Fi 4 support.
  • Touchscreen for direct touch input.
KSh 70,000In Stock
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Apple Watch Ultra 3KSh 90,000
Samsung Galaxy Watch Ultra 2 47mmKSh 62,000
Apple Watch Ultra 4 49mmKSh 118,000
Google Pixel Watch 5 45mmKSh 64,000
Amazfit T-Rex 3 ProKSh 55,000
Apple Watch UltraKSh 90,000
Apple Watch Ultra 2KSh 103,500
2 of 4 products

Our quick verdict

The Apple Watch Series 12 46mm runs watchOS built around the iPhone, takes ECG heart-rhythm readings, is lighter to wear all day and offers hypertension notifications, though it works only with an iPhone, while the Amazfit T-Rex Ultra 2 lasts much longer between charges (30 days vs 24 hours), works with Android phones and iPhones and has a brighter screen for outdoor use.

Battery life

Amazfit T-Rex Ultra 2
870 mAh battery
Apple Watch Series 12 46mm
Up to 24 hours per charge

Portability

Amazfit T-Rex Ultra 2
89.2 g
Apple Watch Series 12 46mm
39.5 g

Storage

Amazfit T-Rex Ultra 2
Up to 64 GB storage
Apple Watch Series 12 46mm
64 GB storage

Display

Amazfit T-Rex Ultra 2
1.5-inch OLED display, 322 ppi
Apple Watch Series 12 46mm
OLED display, 326 ppi

Connections

Amazfit T-Rex Ultra 2
Wi-Fi 4, Bluetooth 5.2
Apple Watch Series 12 46mm
Wi-Fi 4, Bluetooth 5.3

Key differences

The main differences to help you choose.

Amazfit T-Rex Ultra 2

  • Longer battery life: up to 30 days (vs 24 hours).
  • Longer sport-mode battery: up to 50 hours in GPS: mode (vs 10 hours in outdoor workout mode).
  • Brighter display: up to 3,000 nits (vs 2,000).
  • Works with Android phones and iPhones.
  • Swimproof: water resistant to 100 m (vs 50 m).
  • Rated for free diving to 45 m.

Apple Watch Series 12 46mm

  • Lighter: 39.5 g (vs 89.2 g).
  • ECG heart-rhythm readings.
  • Blood-pressure (hypertension) notifications.
  • Slimmer: 9.7 mm thick (vs 14.3 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 Ultra 2Apple Watch Series 12 46mm
Battery life870 mAh batteryUp to 24 hours per charge
StorageUp to 64 GB storage64 GB storage
Display1.5-inch OLED display, 322 ppiOLED display, 326 ppi
ConnectionsWi-Fi 4, Bluetooth 5.2Wi-Fi 4, Bluetooth 5.3
SoftwareWorks with the Zepp appwatchOS 27
Water resistance10 ATM50 m swimproof under ISO 22810:2010

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationAmazfit T-Rex Ultra 2Apple Watch Series 12 46mm
Display1.5-inch AMOLEDAlways-On Retina LTPO3 wide-angle OLED
Screen resolution480 × 480 pixels, 322 ppi42mm: 374 × 446 pixels, 970 mm² display area. 46mm: 416 × 496 pixels, 1196 mm² display area. Both: 326 ppi.
Display protectionSapphire glassCeramic Shield 2 on aluminum cases; sapphire front crystal on titanium and ceramic cases
Display featuresUp to 3,000 nits peak brightness; Always-On Display1 Hz refresh; up to 2,000 nits peak brightness; 1 nit minimum brightness

Connectivity

Connectivity specifications comparison
SpecificationAmazfit T-Rex Ultra 2Apple Watch Series 12 46mm
Wi-Fi2.4 GHz Wi-Fi (802.11 b/g/n)Wi‑Fi 4 (802.11n), 2.4 GHz and 5 GHz
BluetoothBluetooth 5.2 and BLEBluetooth 5.3
Positioning / GNSSBuilt-in dual-band positioning; six satellite positioning systems; circularly polarised GPS antennaPrecision L1 GPS; GLONASS; Galileo; QZSS; BeiDou
Network / cellular—5G RedCap and LTE on GPS + Cellular models; international roaming supported
SIM / eSIM—eSIM on GPS + Cellular models
NFC—Supported; Apple Pay
Ultra Wideband (UWB)—Second-generation Ultra Wideband chip

Identity & design

Identity & design specifications comparison
SpecificationAmazfit T-Rex Ultra 2Apple Watch Series 12 46mm
BrandAmazfitApple
ModelAmazfit T-Rex Ultra 2Apple Watch Series 12 (42mm and 46mm configurations)
Dimensions51 × 51 × 14.3 mm, excluding heart-rate sensor base42mm: aluminum/titanium 42 × 37 × 9.7 mm; ceramic 43 × 37 × 9.85 mm. 46mm: aluminum/titanium 46 × 40 × 9.7 mm; ceramic 47 × 41 × 9.85 mm.
Weight89.2 g with strap42mm: aluminum GPS 32.2 g, GPS + Cellular 31.5 g, titanium 36.5 g, ceramic Pearl White 41.7 g / Night Blue 42.8 g. 46mm: aluminum GPS 39.5 g, GPS + Cellular 38.6 g, titanium 44.9 g, ceramic Pearl White 51.3 g / Night Blue 52.9 g.
Build materialsFibre-reinforced polymer case; Grade 5 titanium bezel, buttons and back panelAluminum, titanium or ceramic case, depending on configuration
Wrist size145–215 mm42mm: 130–200 mm; 46mm: 140–245 mm
Strap / band26 mm silicone strap with classic pin buckleBand supplied; material and size depend on the selected configuration
Controls / buttonsFour physical buttons; sapphire-glass touchscreenDigital Crown with haptic feedback; side button; band-release button; single tap, double tap and wrist flick gestures
Announced—9 September 2026

Performance & software

Performance & software specifications comparison
SpecificationAmazfit T-Rex Ultra 2Apple Watch Series 12 46mm
Storage64 GB total; 26.7 GB available64 GB
Processor—Apple S11 chip; 4-core Neural Engine
CPU—64-bit dual-core
Operating system—watchOS 27

Audio & communication

Audio & communication specifications comparison
SpecificationAmazfit T-Rex Ultra 2Apple Watch Series 12 46mm
SpeakerSupportedSpeaker with media playback
MicrophoneSupportedMicrophone with Voice Isolation
CallingBluetooth calling and call/text notifications through a connected smartphoneBluetooth calling; cellular calling on GPS + Cellular models; international emergency calling

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationAmazfit T-Rex Ultra 2Apple Watch Series 12 46mm
SensorsBioTracker 6.0 PPG biometric sensor (5 photodiodes + 2 LEDs); accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient-light sensor; temperature sensorHigh-g accelerometer; high dynamic-range gyroscope; compass; always-on altimeter; ambient-light sensor; second-generation electrical heart sensor; always-on optical heart sensor; blood-oxygen sensor; temperature sensor; depth gauge; water-temperature sensor
Health & wellness features24-hour heart-rate, blood-oxygen, stress and skin-temperature monitoring; one-tap measurement; HybridCharge, BioCharge and LifeLoad energy insights; VO₂ Max and health alertsHeart rate and HRV; Blood Oxygen; ECG; respiratory rate; wrist temperature; Readiness and Vitals; high/low heart-rate and irregular-rhythm notifications; cycle tracking; hypertension notifications
Sleep trackingSleep HRV; sleep quality; stages including REM; daytime naps; sleep schedule; breathing quality; sleep score; RestoreIQ recovery insightsSleep duration and stages; sleep score; sleep-apnea notifications
Sports / workout modes187 sports modes; smart recognition of 25 strength-training movements and 8 sports movements; HYROX race and training modesRunning; hiking; cycling; pool and open-water swimming; skiing; snowboarding; rowing; paddling; golf; walking; HIIT; yoga; strength; dance; Pilates; Tai Chi; kickboxing; multisport and more
Training & outdoor featuresZepp 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 sensorsCustom workouts and views; Training Load; heart-rate zones; VO₂ max; Race Route; Pacer; running dynamics; automatic track detection; offline maps, routes, waypoints and Backtrack
Safety & emergency featuresTwo-colour flashlight with SOS/Boost modes; storm, high-altitude blood-oxygen and route-deviation alertsEmergency SOS; international emergency calling; Fall Detection; Crash Detection; flashlight; Check In; noise monitoring; emergency waypoints
Diving / depth featuresFreediving and recreational scuba-diving support to 45 m; EN13319:2000, ISO 6425:2018 and GB/T 18828-2022 diving certifications; Bühlmann ZHL-16C decompression modelDepth gauge to 6 m; water-temperature sensor

Battery & durability

Battery & durability specifications comparison
SpecificationAmazfit T-Rex Ultra 2Apple Watch Series 12 46mm
Battery capacity870 mAh rated—
Battery lifeTypical 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 hUp to 24 hours normal use; up to 38 hours Low Power Mode; up to 10 hours outdoor workout
ChargingMagnetic charging head; DC 5 V 1.5 A maximum inputFast-charge capable; up to 80% in about 30 minutes; 15 minutes for up to 12 hours normal use; 5 minutes for up to 10 hours sleep tracking
Water resistance10 ATM; tested to ISO 22810:201050 m swimproof under ISO 22810:2010
Durability / certificationsMIL-STD-810H-2019; low-temperature operation down to −30 °C; SGS water-resistance test; certified diving standardsIP6X dust resistance

Compatibility

Compatibility specifications comparison
SpecificationAmazfit T-Rex Ultra 2Apple Watch Series 12 46mm
Phone compatibilityAndroid 7.0 or later; iOS 15.0 or lateriPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 27 or later
Companion appZepp AppApple Watch app on iPhone; Health and Fitness apps for associated data
ColorsBlack MagmaAluminum: Dark Bronze, Light Gold, Black, Space Gray; titanium: Radiant Gold, Natural; ceramic: Pearl White, Night Blue

Additional specifications

Additional specifications specifications comparison
SpecificationAmazfit T-Rex Ultra 2Apple Watch Series 12 46mm
Flashlight—Supported
Display material—LTPO3 wide-angle OLED
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%; 15 minutes for up to 12 hours normal use; 5 minutes for up to 10 hours sleep tracking
Packing list—Apple Watch Series 12; band; 1 m magnetic fast-charger to USB-C cable
Release status—Available. Released 2026, September 18
Model numbers—A3582, A3587
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
4G bands—1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71
5G bands—1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 38, 40, 41, 66, 71 SA/NSA
Network speed—HSPA, LTE, 5G
Additional hardware features—Health Sensing System: third‑generation electrical heart sensor, always‑on optical heart sensor, blood oxygen sensor, temperature sensor; Temperature sensing (0.01˚ accuracy); Media playback

Similarities

  • Both support Wi-Fi 4.
  • Both work with a companion app.
  • Both take calls over Bluetooth.
  • Both give daily scores (Recovery, BioCharge, Readiness).
  • Both have OLED displays.
  • Both offer up to 64 GB of storage.

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 Series 12 46mm 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 UltraFor Amazfit T-Rex Ultra 2Apple Watch UltraView product ↗Apple Watch Ultra 3For Amazfit T-Rex Ultra 2Apple Watch Ultra 3View product ↗Google Pixel Watch 5 45mmFor Apple Watch Series 12 46mmGoogle Pixel Watch 5 45mmView product ↗Apple Watch Series 12 42mmFor Apple Watch Series 12 46mmApple Watch Series 12 42mmView product ↗

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