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2026 comparison
Updated Jan 16, 2026
|Sources: Amazon, ManufacturerAmazfit T-Rex 3 vs Apple Watch Ultra 2
Choosing between Amazfit T-Rex 3 and Apple Watch Ultra 2 can be tricky. Both are excellent, but they serve different priorities. This guide highlights what matters for US shoppers.
Ratings: 4.5★ vs 4.7★
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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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Apple Watch Ultra 2
★4.7
(1,082)•Amazon
Compatibility:iPhone Xs or later with iOS 18 or later
Operating System:watchOS
Case Size:49mm (49mm H x 44mm W x 14.4mm D)
Case Material:Aerospace-grade titanium (Natural or Black finish)
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Comparison: Amazfit T-Rex 3 vs Apple Watch Ultra 2
Amazfit T-Rex 3
★4.5(1,926)Amazon
Apple Watch Ultra 2
★4.7(1,082)Amazon
| Criterion | Amazfit T-Rex 3 | Apple Watch Ultra 2 |
|---|---|---|
| Rating | ★4.5(1,926)Amazon | ★4.7(1,082)Amazon |
Compatibility | Android 7.0 or later; iOS 14.0 or later (Zepp App required) | iPhone Xs or later with iOS 18 or later |
Operating System | Zepp OS 4 | watchOS |
Case Size | 48.5mm x 48.5mm x 13.75mm | 49mm (49mm H x 44mm W x 14.4mm D) |
Case Material | Polymer middle frame; Stainless steel bezel (316L) | Aerospace-grade titanium (Natural or Black finish) |
Display Type | AMOLED; Gorilla Glass; Peak brightness 2000 nits | Always-On Retina LTPO2 OLED (flat sapphire crystal display) |
Display Size | 1.5 in (38.1 mm) diameter | 1185 sq mm display area |
Resolution | 480 x 480 pixels (322 ppi) | 410 x 502 pixels (326 ppi) |
Always On Display | Yes | Yes |
Water Resistance | 10 ATM (100 meters); Freediving certified (EN13319) to 45m | 100 m (ISO 22810); 40 m recreational high-speed water sports (EN13319) |
Durability | MIL-STD-810H (70°C heat / -30°C cold / Shock / Humidity); Mud-resistant bridge and buttons | IP6X dust resistant; tested to MIL-STD 810H (altitude, high/low temp, temperature shock, immersion, freeze/thaw, ice/freezing rain, shock/vibration) |
GPS | Dual-band GNSS (L1+L5); 6 Satellite Positioning Systems (GPS, GLONASS, Galileo, BeiDou, QZSS, NAVIC) | Precision dual-frequency GPS: L1 and L5 (GPS, GNSS, Galileo, and BeiDou) |
Connectivity | Wi-Fi (2.4GHz); Bluetooth 5.2; BLE | LTE and UMTS (Cellular is standard); Wi-Fi 4 (802.11n); Bluetooth 5.3; Second-generation Ultra Wideband chip |
NFC Payments | Zepp Pay (Europe/parts of Asia only); Not supported on US models | Apple Pay |
Sensors | BioTracker™ 6.0 PPG biometric sensor (SpO2, Heart Rate); Accelerometer; Gyroscope; Geomagnetic sensor; Barometric altimeter; Ambient light sensor; Temperature sensor (skin/water) | Electrical heart sensor (ECG app); 3rd-generation optical heart sensor; temperature sensing; depth gauge (±1 m accuracy); water temperature sensor; compass; always-on altimeter; high-g accelerometer; high dynamic range gyroscope; ambient light sensor; blood oxygen sensor (feature availability subject to US patent rulings) |
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 | ECG app; High/low heart rate notifications; Irregular rhythm notifications; Sleep tracking with stages; Sleep apnea notifications; Vitals app; Cycle tracking with retrospective ovulation estimates; Noise app |
Workout Modes | Hyrox Race mode; Ultramarathon; Freediving; Strength Training (auto-detection of 25 movements); Triathlon; Skiing; Snowboarding; Surf; and 170+ others | Customizable Action Button for instant workout start; Advanced running metrics (stride length, ground contact time); Multisport; Swimming; Hiking; Diving (Oceanic+ app required for dive computer functions) |
Storage | 32GB (Approx. 26GB user-accessible for Music/Maps) | 64GB |
Speaker Mic | Microphone (for Zepp Flow voice commands); No Speaker (Buzzer/Beeper only for alerts) | Dual speakers (40% louder than Series 8); Three-microphone array with beamforming and wind noise mitigation |
Calls | No (Cannot answer calls on wrist; can reject/ignore calls) | Yes (Cellular, Wi-Fi, and iPhone tethering) |
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) | Up to 36 hours (normal use); Up to 72 hours (Low Power Mode) |
Charging | Magnetic charging base (2-pin); Approx. 3 hours to full charge | Fast charging capable (0–80% in approx. 1 hour); USB-C Magnetic Fast Charging Cable included |
Weight | 68.3 g (without strap) | 61.4 g (Natural Titanium); 61.8 g (Black Titanium) [case only] |
Band Sizes | 22mm width; Fits 145–210mm wrists (Proprietary screws but includes adapters for standard bands in some regions) | Trail Loop (S/M, M/L); Alpine Loop (S, M, L); Ocean Band (One Size); fits 130–210mm wrists depending on selection |
Extras | Offline Maps (Contour/Terrain); Turn-by-turn navigation; Zepp Flow (AI voice assistant); Night Display mode; Glove mode | S9 SiP with 4-core Neural Engine; Double tap gesture; On-device Siri; Precision Finding for iPhone 15/16 lineup; 86-decibel Siren; Night Mode (Modular Ultra face) |
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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
As an Amazon Associate I earn from qualifying purchases.
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Apple Watch Ultra 2
Rating:★4.7(1,082)Amazon
Compatibility:iPhone Xs or later with iOS 18 or later
Operating System:watchOS
Case Size:49mm (49mm H x 44mm W x 14.4mm D)
Case Material:Aerospace-grade titanium (Natural or Black finish)
Display Type:Always-On Retina LTPO2 OLED (flat sapphire crystal display)
Display Size:1185 sq mm display area
Resolution:410 x 502 pixels (326 ppi)
Always On Display:Yes
Water Resistance:100 m (ISO 22810); 40 m recreational high-speed water sports (EN13319)
Durability:IP6X dust resistant; tested to MIL-STD 810H (altitude, high/low temp, temperature shock, immersion, freeze/thaw, ice/freezing rain, shock/vibration)
GPS:Precision dual-frequency GPS: L1 and L5 (GPS, GNSS, Galileo, and BeiDou)
Connectivity:LTE and UMTS (Cellular is standard); Wi-Fi 4 (802.11n); Bluetooth 5.3; Second-generation Ultra Wideband chip
NFC Payments:Apple Pay
Sensors:Electrical heart sensor (ECG app); 3rd-generation optical heart sensor; temperature sensing; depth gauge (±1 m accuracy); water temperature sensor; compass; always-on altimeter; high-g accelerometer; high dynamic range gyroscope; ambient light sensor; blood oxygen sensor (feature availability subject to US patent rulings)
Health Features:ECG app; High/low heart rate notifications; Irregular rhythm notifications; Sleep tracking with stages; Sleep apnea notifications; Vitals app; Cycle tracking with retrospective ovulation estimates; Noise app
Workout Modes:Customizable Action Button for instant workout start; Advanced running metrics (stride length, ground contact time); Multisport; Swimming; Hiking; Diving (Oceanic+ app required for dive computer functions)
Storage:64GB
Speaker Mic:Dual speakers (40% louder than Series 8); Three-microphone array with beamforming and wind noise mitigation
Calls:Yes (Cellular, Wi-Fi, and iPhone tethering)
Battery:Up to 36 hours (normal use); Up to 72 hours (Low Power Mode)
Charging:Fast charging capable (0–80% in approx. 1 hour); USB-C Magnetic Fast Charging Cable included
Weight:61.4 g (Natural Titanium); 61.8 g (Black Titanium) [case only]
Band Sizes:Trail Loop (S/M, M/L); Alpine Loop (S, M, L); Ocean Band (One Size); fits 130–210mm wrists depending on selection
Extras:S9 SiP with 4-core Neural Engine; Double tap gesture; On-device Siri; Precision Finding for iPhone 15/16 lineup; 86-decibel Siren; Night Mode (Modular Ultra face)
✓ Pros:
- • Brightest Apple display ever (up to 3,000 nits) for superior outdoor visibility
- • Excellent battery life for an Apple Watch (up to 36 hours standard, 72 hours low power)
- • Rugged titanium build with sapphire crystal and 100m water resistance
- • Fast S9 SiP allows for Double Tap gesture and on-device Siri
- • Precision dual-frequency GPS (L1+L5) offers accurate tracking in dense environments
✗ Cons:
- • Large 49mm x 14.4mm casing is bulky on smaller wrists
- • Blood Oxygen feature is disabled on units sold by Apple in the US (post-Jan 2024)
- • Requires an iPhone to function; no Android compatibility
- • Expensive entry price compared to standard Series models
As an Amazon Associate I earn from qualifying purchases.
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Which one is better?
Looking at user satisfaction (Apple Watch Ultra 2: 4.5★ vs Amazfit T-Rex 3: 4.7★), Apple Watch Ultra 2 pulls ahead. The gap is small—choose based on the priorities below.
Who should buy each?
Amazfit T-Rex 3 excels at: Incredible 27-day battery life crushes the competition, Large, bright 1.5" AMOLED (2000 nits) is easy to read outdoors
Watch for: No built-in speaker (alerts are beeps/vibrations only)
Apple Watch Ultra 2 excels at: Brightest Apple display ever (up to 3,000 nits) for superior outdoor visibility, Excellent battery life for an Apple Watch (up to 36 hours standard, 72 hours low power)
Watch for: Large 49mm x 14.4mm casing is bulky on smaller wrists
Conclusion
Amazfit T-Rex 3 and Apple Watch Ultra 2 are both solid choices. Match the strengths above to your budget and workflow to make the best call.
Frequently Asked Questions
+Which has better value?
Amazfit T-Rex 3 excels if you value incredible 27-day battery life crushes the competition. Apple Watch Ultra 2 is better if you prioritize brightest apple display ever (up to 3,000 nits) for superior outdoor visibility. 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.
Affiliate disclosure
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