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Wearable comparison

Amazfit T-Rex Ultra 2 vs Google Pixel Watch 5 45mm

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
Google Pixel Watch 5 45mm

Google Pixel Watch 5 45mm

  • Qualcomm Snapdragon W5 Gen 2; Cortex-M55 coprocessor processor.
  • 3 GB RAM in this version.
  • 64 GB storage in this version.
  • Runs Wear OS 7.
  • Wi-Fi 6 support.
KSh 64,000In 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
Amazfit T-Rex 3 ProKSh 55,000
Apple Watch UltraKSh 90,000
Apple Watch Ultra 2KSh 103,500
Huawei Watch D3KSh 75,000
2 of 4 products

Our quick verdict

The Amazfit T-Rex Ultra 2 works with Android phones and iPhones, gives daily recovery and BioCharge scores and has a larger 1.5-inch screen, while the Google Pixel Watch 5 45mm takes ECG heart-rhythm readings, is lighter to wear all day and has a sturdier aluminium build.

Connections

Amazfit T-Rex Ultra 2
Wi-Fi 4 support
Google Pixel Watch 5 45mm
Wi-Fi 6 support

Battery life

Amazfit T-Rex Ultra 2
870 mAh battery
Google Pixel Watch 5 45mm
Up to 30 hours per charge

Portability

Amazfit T-Rex Ultra 2
89.2 g
Google Pixel Watch 5 45mm
36.7 g

Storage

Amazfit T-Rex Ultra 2
Up to 64 GB storage
Google Pixel Watch 5 45mm
64 GB storage

Display

Amazfit T-Rex Ultra 2
1.5-inch OLED display, 322 ppi
Google Pixel Watch 5 45mm
1.2-inch OLED display, 60 Hz, 320 ppi

Key differences

The main differences to help you choose.

Amazfit T-Rex Ultra 2

  • Larger 1.5-inch screen (vs 1.2-inch).
  • Works with Android phones and iPhones.
  • Daily recovery and BioCharge scores.
  • Swimproof: water resistant to 100 m (vs 50 m).
  • Rated for free diving to 45 m.
  • Water resistant to 10 ATM (vs 5 ATM).

Google Pixel Watch 5 45mm

  • Lighter: 36.7 g (vs 89.2 g).
  • ECG heart-rhythm readings.
  • Aluminium case (vs plastic case).
  • Syncs with third-party apps such as Strava and Apple Health.
  • Newer Wi-Fi 6 (vs Wi-Fi 4).
  • Dual-band Wi-Fi (vs 2.4 GHz only).

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 2Google Pixel Watch 5 45mm
Battery life870 mAh batteryUp to 30 hours per charge
StorageUp to 64 GB storage64 GB storage
Display1.5-inch OLED display, 322 ppi1.2-inch OLED display, 60 Hz, 320 ppi
ConnectionsWi-Fi 4, Bluetooth 5.2Wi-Fi 6, Bluetooth 6.0
Battery capacity870 mAh battery41 mm: 332 mAh
SoftwareWorks with the Zepp appWear OS 7

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationAmazfit T-Rex Ultra 2Google Pixel Watch 5 45mm
Display1.5-inch AMOLED41 mm: 1.2-inch; 45 mm: 1.4-inch Actua 360 LTPO AMOLED
Screen resolution480 × 480 pixels, 322 ppi41 mm: 408 × 408; 45 mm: 456 × 456 pixels; 320 ppi
Display protectionSapphire glass3D Corning Gorilla Glass 5
Display featuresUp to 3,000 nits peak brightness; Always-On DisplayAlways-on display; 1–60 Hz; DCI-P3 colour

Connectivity

Connectivity specifications comparison
SpecificationAmazfit T-Rex Ultra 2Google Pixel Watch 5 45mm
Wi-Fi2.4 GHz Wi-Fi (802.11 b/g/n)Wi-Fi 802.11a/b/g/n/ac/ax; 2.4 GHz + 5 GHz
BluetoothBluetooth 5.2 and BLEBluetooth 6.0
Positioning / GNSSBuilt-in dual-band positioning; six satellite positioning systems; circularly polarised GPS antennaDual-band L1 + L5; GPS; Galileo; GLONASS; BeiDou; QZSS
Network / cellular—LTE and UMTS on cellular editions
SIM / eSIM—LTE edition: eSIM
NFC—Supported
Ultra Wideband (UWB)—Supported
Satellite features—Satellite SOS on LTE edition; regional availability

Identity & design

Identity & design specifications comparison
SpecificationAmazfit T-Rex Ultra 2Google Pixel Watch 5 45mm
BrandAmazfitGoogle
ModelAmazfit T-Rex Ultra 2Google Pixel Watch 5 (41 mm and 45 mm configurations)
Dimensions51 × 51 × 14.3 mm, excluding heart-rate sensor base41 mm or 45 mm diameter × 12.3 mm height
Weight89.2 g with strap41 mm: 31 g; 45 mm: 36.7 g, without band
Build materialsFibre-reinforced polymer case; Grade 5 titanium bezel, buttons and back panelAluminum case
Wrist size145–215 mm41 mm: small 130–175 mm, large 165–210 mm; 45 mm: small 150–185 mm, large 165–215 mm
Strap / band26 mm silicone strap with classic pin buckleSecond-generation Active Band; soft-touch HNBR
Controls / buttonsFour physical buttons; sapphire-glass touchscreenTouchless one-handed gestures Side button Haptic crown Gen 3 premium haptics
Announced—2026, August 12

Performance & software

Performance & software specifications comparison
SpecificationAmazfit T-Rex Ultra 2Google Pixel Watch 5 45mm
Storage64 GB total; 26.7 GB available64 GB eMMC
Processor—Qualcomm Snapdragon W5 Gen 2; Cortex-M55 coprocessor
CPU—Quad-core (4x1.7 GHz Cortex-A53)
GPU—Adreno A702
RAM—3 GB
Operating system—Wear OS 7

Audio & communication

Audio & communication specifications comparison
SpecificationAmazfit T-Rex Ultra 2Google Pixel Watch 5 45mm
SpeakerSupportedSupported
MicrophoneSupportedSupported
CallingBluetooth calling and call/text notifications through a connected smartphoneYes

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationAmazfit T-Rex Ultra 2Google Pixel Watch 5 45mm
SensorsBioTracker 6.0 PPG biometric sensor (5 photodiodes + 2 LEDs); accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient-light sensor; temperature sensorCompass; altimeter; red and infrared SpO₂ sensors; electrical ECG sensors; multipath optical heart-rate sensor; accelerometer; gyroscope; ambient-light sensor; cEDA skin-conductance sensor; far-field skin-temperature sensor; barometer; magnetometer
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 alertsContinuous heart rate; ECG; SpO₂; skin temperature; stress tracking; cEDA
Sleep trackingSleep HRV; sleep quality; stages including REM; daytime naps; sleep schedule; breathing quality; sleep score; RestoreIQ recovery insightsSleep stages; sleep score; overnight health metrics
Sports / workout modes187 sports modes; smart recognition of 25 strength-training movements and 8 sports movements; HYROX race and training modes—
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 sensors—
Safety & emergency featuresTwo-colour flashlight with SOS/Boost modes; storm, high-altitude blood-oxygen and route-deviation alertsEmergency SOS; fall detection; safety check
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 model5 ATM

Battery & durability

Battery & durability specifications comparison
SpecificationAmazfit T-Rex Ultra 2Google Pixel Watch 5 45mm
Battery capacity870 mAh rated41 mm: 332 mAh; 45 mm: 465 mAh
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 h41 mm: 30 hours AOD, 48 hours Battery Saver; 45 mm: 40 hours AOD, 72 hours Battery Saver
ChargingMagnetic charging head; DC 5 V 1.5 A maximum inputUSB-C magnetic pin charging
Water resistance10 ATM; tested to ISO 22810:20105 ATM; IP68
Durability / certificationsMIL-STD-810H-2019; low-temperature operation down to −30 °C; SGS water-resistance test; certified diving standardsCustom 3D Corning® Gorilla® Glass 5

Compatibility

Compatibility specifications comparison
SpecificationAmazfit T-Rex Ultra 2Google Pixel Watch 5 45mm
Phone compatibilityAndroid 7.0 or later; iOS 15.0 or laterAndroid 12 or later; Google account
Companion appZepp AppGoogle Pixel Watch; Fitbit
ColorsBlack Magma41 mm: Obsidian, Fog, Olive, Canyon; 45 mm: Obsidian, Fog, Olive

Additional specifications

Additional specifications specifications comparison
SpecificationAmazfit T-Rex Ultra 2Google Pixel Watch 5 45mm
Case material—100% recycled aluminum
Pixels per inch—320 ppi
Peak brightness—3,000 nits peak; 1 nit minimum
Charging time—41 mm: 15/25/45 minutes to 50/80/100%; 45 mm: 15/30/60 minutes
Packing list—Watch; small and large bands; charging dock or cable; quick start guide
Third-party fitness apps—Google Play apps; Google Maps; Google Wallet; Google Assistant
Release status—Available. Released 2026, August 20
Model numbers—G0F3Y, G1XJ6, G25QD, GFW3R
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—LTE
Network speed—HSPA, LTE

Similarities

  • Both take calls over Bluetooth.
  • Both have OLED displays.
  • Both offer up to 64 GB of storage.
  • Both connect over Bluetooth.
  • Both have a speaker.
  • Both have a microphone.

In summary

Get the Amazfit T-Rex Ultra 2 if you want a choice of Android phone or iPhone and daily recovery and BioCharge scores, or the Google Pixel Watch 5 45mm 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 ↗Apple Watch Series 12 42mmFor Google Pixel Watch 5 45mmApple Watch Series 12 42mmView product ↗Samsung Galaxy Watch Ultra 2 47mmFor Google Pixel Watch 5 45mmSamsung Galaxy Watch Ultra 2 47mmView product ↗

Related comparisons

Apple Watch Ultra 3Amazfit T-Rex Ultra 2Samsung Galaxy Watch Ultra 2 47mmAmazfit T-Rex Ultra 2Amazfit T-Rex Ultra 2Apple Watch Ultra 4 49mmAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2Apple Watch UltraAmazfit T-Rex Ultra 2Apple Watch Ultra 2Amazfit T-Rex Ultra 2Amazfit T-Rex Ultra 2Huawei Watch D3AmazFit FalconAmazfit T-Rex Ultra 2Huawei Watch Ultimate 2Amazfit T-Rex Ultra 2
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