← Back to Smartwatches
2026 comparison
Updated Jan 7, 2026
|Sources: Amazon, ManufacturerApple Watch Ultra 2 vs Amazfit T-Rex 3
The Apple Watch Ultra 2 is the premium option here, boasting an impressive 3,000 nits display and advanced health tracking features. Meanwhile, the Amazfit T-Rex 3 offers an incredible 27-day battery life but lacks some of the high-end features that Apple provides. In real-world use, the differences matter. The Apple Watch Ultra 2's 36-hour battery life in standard use is great for daily wear, while the Amazfit's 27 days means less frequent charging. However, if you're after superior outdoor visibility and robust health features, the Apple Watch Ultra 2 crushes the competition.
⚖️ Weight: 2.18 oz vs 2.41 oz💽 Storage: 64 GB vs 32 GB💧 Water Resistance: 100m vs 10 ATM
As an Amazon Associate I earn from qualifying purchases.
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)
Check Amazon Price→
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)
Check Amazon Price→
Key spec differences
Only the specs that differ are shown here. Winners are highlighted when the data is clear.
Winner= clear advantage
Spec
Apple Watch Ultra 2
Amazfit T-Rex 3
Display2 specs
Display SizeKey
Apple Watch Ultra 2
1185 sq mm display area
Amazfit T-Rex 3
1.5 in (38.1 mm) diameter
Resolution
Apple Watch Ultra 2
410 x 502 pixels (326 ppi)
Amazfit T-Rex 3
480 x 480 pixels (322 ppi)
Performance1 specs
Storage
Apple Watch Ultra 2
64GBWinner
Amazfit T-Rex 3
32GB (Approx. 26GB user-accessible for Music/Maps)
Battery1 specs
Battery CapacityKey
Apple Watch Ultra 2
Up to 36 hours (normal use); Up to 72 hours (Low Power Mode)
Amazfit T-Rex 3
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)
Design2 specs
Weight
Apple Watch Ultra 2
61.4 g (Natural Titanium); 61.8 g (Black Titanium) [case only]Winner
Amazfit T-Rex 3
68.3 g (without strap)
Water Resistance
Apple Watch Ultra 2
100 m (ISO 22810); 40 m recreational high-speed water sports (EN13319)
Amazfit T-Rex 3
10 ATM (100 meters); Freediving certified (EN13319) to 45m
Software1 specs
Operating System
Apple Watch Ultra 2
watchOS
Amazfit T-Rex 3
Zepp OS 4
Connectivity1 specs
Connectivity
Apple Watch Ultra 2
LTE and UMTS (Cellular is standard); Wi-Fi 4 (802.11n); Bluetooth 5.3; Second-generation Ultra Wideband chip
Amazfit T-Rex 3
Wi-Fi (2.4GHz); Bluetooth 5.2; BLE
+Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Expand
Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Comparison: Apple Watch Ultra 2 vs Amazfit T-Rex 3
Apple Watch Ultra 2
★4.7(1,082)Amazon
Amazfit T-Rex 3
★4.5(1,926)Amazon
| Criterion | Apple Watch Ultra 2 | Amazfit T-Rex 3 |
|---|---|---|
| Rating | ★4.7(1,082)Amazon | ★4.5(1,926)Amazon |
Compatibility | iPhone Xs or later with iOS 18 or later | Android 7.0 or later; iOS 14.0 or later (Zepp App required) |
Operating System | watchOS | Zepp OS 4 |
Case Size | 49mm (49mm H x 44mm W x 14.4mm D) | 48.5mm x 48.5mm x 13.75mm |
Case Material | Aerospace-grade titanium (Natural or Black finish) | Polymer middle frame; Stainless steel bezel (316L) |
Display Type | Always-On Retina LTPO2 OLED (flat sapphire crystal display) | AMOLED; Gorilla Glass; Peak brightness 2000 nits |
Display Size | 1185 sq mm display area | 1.5 in (38.1 mm) diameter |
Resolution | 410 x 502 pixels (326 ppi) | 480 x 480 pixels (322 ppi) |
Always On Display | Yes | Yes |
Water Resistance | 100 m (ISO 22810); 40 m recreational high-speed water sports (EN13319) | 10 ATM (100 meters); Freediving certified (EN13319) to 45m |
Durability | IP6X dust resistant; tested to MIL-STD 810H (altitude, high/low temp, temperature shock, immersion, freeze/thaw, ice/freezing rain, shock/vibration) | MIL-STD-810H (70°C heat / -30°C cold / Shock / Humidity); Mud-resistant bridge and buttons |
GPS | Precision dual-frequency GPS: L1 and L5 (GPS, GNSS, Galileo, and BeiDou) | Dual-band GNSS (L1+L5); 6 Satellite Positioning Systems (GPS, GLONASS, Galileo, BeiDou, QZSS, NAVIC) |
Connectivity | LTE and UMTS (Cellular is standard); Wi-Fi 4 (802.11n); Bluetooth 5.3; Second-generation Ultra Wideband chip | Wi-Fi (2.4GHz); Bluetooth 5.2; BLE |
NFC Payments | Apple Pay | Zepp Pay (Europe/parts of Asia only); Not supported on US models |
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) | BioTracker™ 6.0 PPG biometric sensor (SpO2, Heart Rate); Accelerometer; Gyroscope; Geomagnetic sensor; Barometric altimeter; Ambient light sensor; Temperature sensor (skin/water) |
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 | 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 | 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) | Hyrox Race mode; Ultramarathon; Freediving; Strength Training (auto-detection of 25 movements); Triathlon; Skiing; Snowboarding; Surf; and 170+ others |
Storage | 64GB | 32GB (Approx. 26GB user-accessible for Music/Maps) |
Speaker Mic | Dual speakers (40% louder than Series 8); Three-microphone array with beamforming and wind noise mitigation | Microphone (for Zepp Flow voice commands); No Speaker (Buzzer/Beeper only for alerts) |
Calls | Yes (Cellular, Wi-Fi, and iPhone tethering) | No (Cannot answer calls on wrist; can reject/ignore calls) |
Battery | Up to 36 hours (normal use); Up to 72 hours (Low Power Mode) | 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 | Fast charging capable (0–80% in approx. 1 hour); USB-C Magnetic Fast Charging Cable included | Magnetic charging base (2-pin); Approx. 3 hours to full charge |
Weight | 61.4 g (Natural Titanium); 61.8 g (Black Titanium) [case only] | 68.3 g (without strap) |
Band Sizes | Trail Loop (S/M, M/L); Alpine Loop (S, M, L); Ocean Band (One Size); fits 130–210mm wrists depending on selection | 22mm width; Fits 145–210mm wrists (Proprietary screws but includes adapters for standard bands in some regions) |
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) | Offline Maps (Contour/Terrain); Turn-by-turn navigation; Zepp Flow (AI voice assistant); Night Display mode; Glove mode |
| Pros |
|
|
| Cons |
|
|
As an Amazon Associate I earn from qualifying purchases. | Check Price on Amazon→ | Check Price on Amazon→ |
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.
Check Price on Amazon→
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.
Check Price on Amazon→
Which one is better?
The Apple Watch Ultra 2 is the better buy for most people - its 3,000 nits display crushes the Amazfit T-Rex 3's 2,000 nits. That said, grab the Amazfit T-Rex 3 if you need a watch that lasts up to 27 days on a single charge - it's a no-brainer for long trips.
Who should buy each?
Choose the Apple Watch Ultra 2 if: you value outdoor visibility with a 3,000 nits display, need advanced health tracking features, or want a rugged design for extreme conditions.
Choose the Amazfit T-Rex 3 if: you want unbeatable battery life lasting 27 days, prefer a similar-weight watch at 2.41oz, or need offline maps for navigation.
Conclusion
Apple Watch Ultra 2 and Amazfit T-Rex 3 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?
Apple Watch Ultra 2 excels if you value brightest apple display ever (up to 3,000 nits) for superior outdoor visibility. Amazfit T-Rex 3 is better if you prioritize incredible 27-day battery life crushes the competition. 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
PageBen uses Amazon affiliate links. If you purchase through our links, we may earn a commission at no extra cost to you. This supports independent content for US shoppers.