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2026 comparison
Updated Jan 16, 2026
|Sources: Amazon, ManufacturerAmazfit T-Rex 3 vs Google Pixel Watch 3 (45mm)
If you are torn between Amazfit T-Rex 3 and Google Pixel Watch 3 (45mm), this breakdown is for you. We compare specs, pros, and cons so you can decide confidently.
Ratings: 4.5★ vs 4.4★
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Amazfit T-Rex 3
★4.5
(1,926)•Amazon
Compatibility:Android 7.0 or later; iOS 14.0 or later (Zepp App required)
Operating System:Zepp OS 4
Case Size:48.5mm x 48.5mm x 13.75mm
Case Material:Polymer middle frame; Stainless steel bezel (316L)
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Google Pixel Watch 3 (45mm)
★4.4
(1,794)•Amazon
Compatibility:Android 10.0 or newer (requires Google Account and Pixel Watch app); Not compatible with iOS
Operating System:Wear OS 5.0
Case Size:45mm diameter x 12.3mm height
Case Material:100% recycled aluminum housing; Custom 3D Corning Gorilla Glass 5
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Comparison: Amazfit T-Rex 3 vs Google Pixel Watch 3 (45mm)
Amazfit T-Rex 3
★4.5(1,926)Amazon
Google Pixel Watch 3 (45mm)
★4.4(1,794)Amazon
| Criterion | Amazfit T-Rex 3 | Google Pixel Watch 3 (45mm) |
|---|---|---|
| Rating | ★4.5(1,926)Amazon | ★4.4(1,794)Amazon |
Compatibility | Android 7.0 or later; iOS 14.0 or later (Zepp App required) | Android 10.0 or newer (requires Google Account and Pixel Watch app); Not compatible with iOS |
Operating System | Zepp OS 4 | Wear OS 5.0 |
Case Size | 48.5mm x 48.5mm x 13.75mm | 45mm diameter x 12.3mm height |
Case Material | Polymer middle frame; Stainless steel bezel (316L) | 100% recycled aluminum housing; Custom 3D Corning Gorilla Glass 5 |
Display Type | AMOLED; Gorilla Glass; Peak brightness 2000 nits | Actua Display (AMOLED LTPO); 1–60Hz responsive refresh rate; Peak brightness 2000 nits; Minimum 1 nit |
Display Size | 1.5 in (38.1 mm) diameter | 1.4 in (approx. 40% more screen area than Pixel Watch 2) |
Resolution | 480 x 480 pixels (322 ppi) | 456 x 456 pixels (320 ppi); DCI-P3 color |
Always On Display | Yes | Yes |
Water Resistance | 10 ATM (100 meters); Freediving certified (EN13319) to 45m | 5 ATM (ISO 22810:2010); IP68 (Dust and water resistant) |
Durability | MIL-STD-810H (70°C heat / -30°C cold / Shock / Humidity); Mud-resistant bridge and buttons | IP68 dust and water resistance rating; Custom 3D Corning Gorilla Glass 5 |
GPS | Dual-band GNSS (L1+L5); 6 Satellite Positioning Systems (GPS, GLONASS, Galileo, BeiDou, QZSS, NAVIC) | GPS, GLONASS, Galileo, BeiDou, QZSS |
Connectivity | Wi-Fi (2.4GHz); Bluetooth 5.2; BLE | 4G LTE (optional); Wi-Fi 6 (802.11ax) 2.4GHz + 5GHz; Bluetooth 5.3; NFC; Ultra-Wideband (UWB) |
NFC Payments | Zepp Pay (Europe/parts of Asia only); Not supported on US models | Google Wallet |
Sensors | BioTracker™ 6.0 PPG biometric sensor (SpO2, Heart Rate); Accelerometer; Gyroscope; Geomagnetic sensor; Barometric altimeter; Ambient light sensor; Temperature sensor (skin/water) | Compass; Altimeter; Red and infrared sensors for oxygen saturation (SpO2); Multipurpose electrical sensors (ECG); Multi-path optical heart rate sensor; 3-axis accelerometer; Gyroscope; Ambient light sensor; cEDA sensor (stress); Skin temperature sensor; Ultra-Wideband |
Health Features | Readiness Score; HRV (Heart Rate Variability); Sleep Breathing Quality; One-tap measuring (HR, SpO2, Stress, Breathing rate); Sleep stages (REM/Deep/Light); PAI Health Assessment | Loss of Pulse Detection; Daily Readiness; Cardio Load; Target Load; Sleep Profile; ECG app; SpO2; High/low heart rate notifications; Irregular heart rhythm notifications; Skin temperature variations; Body Response (stress detection) |
Workout Modes | Hyrox Race mode; Ultramarathon; Freediving; Strength Training (auto-detection of 25 movements); Triathlon; Skiing; Snowboarding; Surf; and 170+ others | Advanced Running Form (Cadence, Stride Length, Vertical Oscillation, Ground Contact Time); Custom Runs; Interval Training; 40+ exercise modes including HIIT, Pilates, Strength, Cross-country skiing, and more |
Storage | 32GB (Approx. 26GB user-accessible for Music/Maps) | 32GB eMMC flash |
Speaker Mic | Microphone (for Zepp Flow voice commands); No Speaker (Buzzer/Beeper only for alerts) | Built-in speaker; Built-in microphone |
Calls | No (Cannot answer calls on wrist; can reject/ignore calls) | Yes (Bluetooth); LTE models support standalone calls |
Battery | 700 mAh; Up to 27 days (Typical usage); Up to 13 days (Heavy usage); Up to 42 hours (Accuracy GPS mode); Up to 114 hours (GPS Long Battery Life) | 420 mAh (typical); Up to 24 hours (Always-on Display enabled); Up to 36 hours (Battery Saver mode) |
Charging | Magnetic charging base (2-pin); Approx. 3 hours to full charge | USB-C Fast Charging Cable (included); 0–50% in ~28 min; 0–80% in ~50 min; 0–100% in ~80 min |
Weight | 68.3 g (without strap) | 37 g (without band) |
Band Sizes | 22mm width; Fits 145–210mm wrists (Proprietary screws but includes adapters for standard bands in some regions) | Active Band: Small fits 150–185 mm wrists; Large fits 165–215 mm wrists |
Extras | Offline Maps (Contour/Terrain); Turn-by-turn navigation; Zepp Flow (AI voice assistant); Night Display mode; Glove mode | UWB for Watch Unlock and finding devices; Google Home control; Camera Remote for Pixel phones; Offline Google Maps; Recorder app |
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Amazfit T-Rex 3
Rating:★4.5(1,926)Amazon
Compatibility:Android 7.0 or later; iOS 14.0 or later (Zepp App required)
Operating System:Zepp OS 4
Case Size:48.5mm x 48.5mm x 13.75mm
Case Material:Polymer middle frame; Stainless steel bezel (316L)
Display Type:AMOLED; Gorilla Glass; Peak brightness 2000 nits
Display Size:1.5 in (38.1 mm) diameter
Resolution:480 x 480 pixels (322 ppi)
Always On Display:Yes
Water Resistance:10 ATM (100 meters); Freediving certified (EN13319) to 45m
Durability:MIL-STD-810H (70°C heat / -30°C cold / Shock / Humidity); Mud-resistant bridge and buttons
GPS:Dual-band GNSS (L1+L5); 6 Satellite Positioning Systems (GPS, GLONASS, Galileo, BeiDou, QZSS, NAVIC)
Connectivity:Wi-Fi (2.4GHz); Bluetooth 5.2; BLE
NFC Payments:Zepp Pay (Europe/parts of Asia only); Not supported on US models
Sensors:BioTracker™ 6.0 PPG biometric sensor (SpO2, Heart Rate); Accelerometer; Gyroscope; Geomagnetic sensor; Barometric altimeter; Ambient light sensor; Temperature sensor (skin/water)
Health Features:Readiness Score; HRV (Heart Rate Variability); Sleep Breathing Quality; One-tap measuring (HR, SpO2, Stress, Breathing rate); Sleep stages (REM/Deep/Light); PAI Health Assessment
Workout Modes:Hyrox Race mode; Ultramarathon; Freediving; Strength Training (auto-detection of 25 movements); Triathlon; Skiing; Snowboarding; Surf; and 170+ others
Storage:32GB (Approx. 26GB user-accessible for Music/Maps)
Speaker Mic:Microphone (for Zepp Flow voice commands); No Speaker (Buzzer/Beeper only for alerts)
Calls:No (Cannot answer calls on wrist; can reject/ignore calls)
Battery:700 mAh; Up to 27 days (Typical usage); Up to 13 days (Heavy usage); Up to 42 hours (Accuracy GPS mode); Up to 114 hours (GPS Long Battery Life)
Charging:Magnetic charging base (2-pin); Approx. 3 hours to full charge
Weight:68.3 g (without strap)
Band Sizes:22mm width; Fits 145–210mm wrists (Proprietary screws but includes adapters for standard bands in some regions)
Extras:Offline Maps (Contour/Terrain); Turn-by-turn navigation; Zepp Flow (AI voice assistant); Night Display mode; Glove mode
✓ Pros:
- • Incredible 27-day battery life crushes the competition
- • Large, bright 1.5" AMOLED (2000 nits) is easy to read outdoors
- • Free offline contour maps with turn-by-turn navigation
- • Freediving certified to 45m (rare at this price point)
- • Generous 32GB storage for offline music and global maps
✗ Cons:
- • No built-in speaker (alerts are beeps/vibrations only)
- • NFC payments (Zepp Pay) are not supported on US hardware
- • Large 48.5mm case is bulky for smaller wrists
- • Proprietary strap system requires adapters to use standard bands
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Google Pixel Watch 3 (45mm)
Rating:★4.4(1,794)Amazon
Compatibility:Android 10.0 or newer (requires Google Account and Pixel Watch app); Not compatible with iOS
Operating System:Wear OS 5.0
Case Size:45mm diameter x 12.3mm height
Case Material:100% recycled aluminum housing; Custom 3D Corning Gorilla Glass 5
Display Type:Actua Display (AMOLED LTPO); 1–60Hz responsive refresh rate; Peak brightness 2000 nits; Minimum 1 nit
Display Size:1.4 in (approx. 40% more screen area than Pixel Watch 2)
Resolution:456 x 456 pixels (320 ppi); DCI-P3 color
Always On Display:Yes
Water Resistance:5 ATM (ISO 22810:2010); IP68 (Dust and water resistant)
Durability:IP68 dust and water resistance rating; Custom 3D Corning Gorilla Glass 5
GPS:GPS, GLONASS, Galileo, BeiDou, QZSS
Connectivity:4G LTE (optional); Wi-Fi 6 (802.11ax) 2.4GHz + 5GHz; Bluetooth 5.3; NFC; Ultra-Wideband (UWB)
NFC Payments:Google Wallet
Sensors:Compass; Altimeter; Red and infrared sensors for oxygen saturation (SpO2); Multipurpose electrical sensors (ECG); Multi-path optical heart rate sensor; 3-axis accelerometer; Gyroscope; Ambient light sensor; cEDA sensor (stress); Skin temperature sensor; Ultra-Wideband
Health Features:Loss of Pulse Detection; Daily Readiness; Cardio Load; Target Load; Sleep Profile; ECG app; SpO2; High/low heart rate notifications; Irregular heart rhythm notifications; Skin temperature variations; Body Response (stress detection)
Workout Modes:Advanced Running Form (Cadence, Stride Length, Vertical Oscillation, Ground Contact Time); Custom Runs; Interval Training; 40+ exercise modes including HIIT, Pilates, Strength, Cross-country skiing, and more
Storage:32GB eMMC flash
Speaker Mic:Built-in speaker; Built-in microphone
Calls:Yes (Bluetooth); LTE models support standalone calls
Battery:420 mAh (typical); Up to 24 hours (Always-on Display enabled); Up to 36 hours (Battery Saver mode)
Charging:USB-C Fast Charging Cable (included); 0–50% in ~28 min; 0–80% in ~50 min; 0–100% in ~80 min
Weight:37 g (without band)
Band Sizes:Active Band: Small fits 150–185 mm wrists; Large fits 165–215 mm wrists
Extras:UWB for Watch Unlock and finding devices; Google Home control; Camera Remote for Pixel phones; Offline Google Maps; Recorder app
✓ Pros:
- • Significantly larger and brighter display (2000 nits) than predecessors
- • Advanced running metrics (stride, oscillation) without external pods
- • Unique 'Loss of Pulse Detection' safety feature (first-of-kind)
- • Deepest integration with Google ecosystem (Nest, Maps, Pixel Camera)
- • Fast charging helps offset the 24-hour daily battery cycle
✗ Cons:
- • Battery life rated for only 24h with AOD (daily charging required)
- • Strictly incompatible with iPhone (Android 10+ only)
- • Some advanced health insights require Fitbit Premium subscription
- • Uses proprietary charging pin connection (not standard Qi wireless)
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Which one is better?
Looking at user satisfaction (Amazfit T-Rex 3: 4.5★ vs Google Pixel Watch 3 (45mm): 4.4★), Amazfit T-Rex 3 pulls ahead. The gap is small—choose based on the priorities below.
Who should buy each?
Choose Amazfit T-Rex 3 if:
- You want Incredible 27-day battery life crushes the competition, Large, bright 1.5" AMOLED (2000 nits) is easy to read outdoors
- Rating: 4.5★ (1926 reviews)
Choose Google Pixel Watch 3 (45mm) if:
- You prefer Significantly larger and brighter display (2000 nits) than predecessors, Advanced running metrics (stride, oscillation) without external pods
- Rating: 4.4★ (1794 reviews)
Conclusion
With the key differences outlined, the decision should be clearer. Both options deliver quality—choose the one that fits your priorities.
Frequently Asked Questions
+Which has better value?
Amazfit T-Rex 3 excels if you value incredible 27-day battery life crushes the competition. Google Pixel Watch 3 (45mm) is better if you prioritize significantly larger and brighter display (2000 nits) than predecessors. Pick based on your budget and daily use.
+Is this an independent review?
Yes. We use affiliate links for monetization, but recommendations are research-driven and unbiased.
+Do newer models exist?
Check release timelines from the manufacturers and compare pricing before you buy. We refresh this page when major updates land.
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