Samsung Galaxy Watch Ultra vs Amazfit T-Rex 3 Pro
Compare specifications, current prices and availability. Choose up to four products from the same family.
Add up to 2 more items to compare
Apple Watch Series 8 Price range: KSh 50,000.00 through KSh 53,000.00
Apple Watch Ultra 2KSh 103,500.00
Apple Watch UltraKSh 90,000.00
Apple Watch Series 9 Price range: KSh 45,000.00 through KSh 49,500.00
At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Samsung Galaxy Watch Ultra |  Amazfit T-Rex 3 Pro |
|---|---|---|
| Price | KSh 45,000.00 | Price range: KSh 55,000.00 through KSh 65,000.00 |
| Display | 1.5-inch Super AMOLED | AMOLED 48 mm: 1.5-inch 44 mm: 1.32-inch |
| Battery capacity | 590 mAh | 48 mm: 700 mAh rated 44 mm: 500 mAh rated |
| Water resistance | 10 ATM | 10 ATM |
| Processor | Exynos W1000 (3 nm) | — |
| RAM | 2 GB | — |
| Storage | 32 GB | — |
| Operating system | Wear OS Powered by Samsung; One UI Watch | Zepp OS 5 |
| Network / cellular | LTE and UMTS; availability varies by carrier and region | — |
| Positioning / GNSS | Built-in dual-frequency L1 + L5 GPS; GPS, GLONASS, BeiDou and Galileo | Built-in six-satellite positioning with circularly polarized GPS antenna |
| Health & wellness features | Heart-rate monitoring, ECG, blood pressure, body composition, blood oxygen, skin temperature and Energy Score; availability varies by market and paired phone | Heart rate, blood oxygen, stress, HRV, readiness and temperature insights; wellness measurements are not intended for medical diagnosis |
Full specifications
2 of 4 products
| Specification | Samsung Galaxy Watch Ultra | Amazfit T-Rex 3 Pro |
|---|---|---|
| Identity & design | ||
| Brand | Samsung | Amazfit |
| Model | Galaxy Watch Ultra | T-Rex 3 Pro |
| Announced | July 2024 | — |
| Dimensions | 47.4 × 47.1 × 12.1 mm | 48 mm: 48 × 48 × 14 mm 44 mm: 44.8 × 44.8 × 13.2 mm Heart-rate sensor base excluded |
| Weight | 60.5 g | 48 mm: 52 g 44 mm: 46.8 g Without strap |
| Build materials | Grade 4 titanium case; sapphire-crystal display | Fiber-reinforced polymer case with Grade 5 titanium bezel and buttons; sapphire-glass touchscreen |
| Wrist size | — | 48 mm: 145–210 mm 44 mm: 140–205 mm |
| Strap / band | — | Silicone quick-release strap 48 mm: 22 mm 44 mm: 20 mm |
| Controls / buttons | Touchscreen; Quick button; Home and Back buttons | Four physical buttons and touchscreen |
| Display | ||
| Display | 1.5-inch Super AMOLED | AMOLED 48 mm: 1.5-inch 44 mm: 1.32-inch |
| Screen resolution | 480 × 480 pixels | 48 mm: 480 × 480 pixels, 322 ppi 44 mm: 466 × 466 pixels, 353 ppi |
| Display protection | Sapphire crystal | Sapphire glass |
| Display features | Full-colour Always-On Display; up to 3,000 nits | Up to 3,000 nits peak brightness; always-on display |
| Performance & software | ||
| Processor | Exynos W1000 (3 nm) | — |
| CPU | 5-core CPU up to 1.6 GHz | — |
| RAM | 2 GB | — |
| Storage | 32 GB | — |
| Operating system | Wear OS Powered by Samsung; One UI Watch | Zepp OS 5 |
| Connectivity | ||
| Network / cellular | LTE and UMTS; availability varies by carrier and region | — |
| SIM / eSIM | eSIM | — |
| Wi-Fi | 802.11a/b/g/n, 2.4 GHz and 5 GHz | 2.4 GHz Wi-Fi |
| Bluetooth | Bluetooth 5.3 | Bluetooth 5.2 BLE |
| NFC | Supported | — |
| Positioning / GNSS | Built-in dual-frequency L1 + L5 GPS; GPS, GLONASS, BeiDou and Galileo | Built-in six-satellite positioning with circularly polarized GPS antenna |
| Audio & communication | ||
| Speaker | Speaker and siren | Built-in speaker |
| Microphone | Microphone | Built-in microphone |
| Calling | Standalone LTE calling and Bluetooth calling; carrier support required | Bluetooth calling when paired with a compatible phone |
| Sensors, health & fitness | ||
| Sensors | Samsung BioActive Sensor (optical heart-rate, electrical heart and bioelectrical impedance analysis), infrared temperature sensor, accelerometer, barometer, gyroscope, geomagnetic sensor and light sensor | BioTracker 6.0 PPG biometric sensor (5PD + 2LED), accelerometer, gyroscope, geomagnetic sensor, barometric altimeter, ambient-light sensor and temperature sensor |
| Health & wellness features | Heart-rate monitoring, ECG, blood pressure, body composition, blood oxygen, skin temperature and Energy Score; availability varies by market and paired phone | Heart rate, blood oxygen, stress, HRV, readiness and temperature insights; wellness measurements are not intended for medical diagnosis |
| Sleep tracking | Sleep tracking, sleep coaching and sleep-apnoea features where available | Sleep stages, naps, sleep score, breathing quality and recovery insights |
| Sports / workout modes | Multiple workout modes including multisport and automatic workout detection | 187 sports modes with smart recognition for strength-training and sports movements |
| Training & outdoor features | Dual-frequency GPS; GPX routes; Track Back; personalised heart-rate zones; Functional Threshold Power | Offline base, contour and ski maps; turn-by-turn navigation, POI search, route planning, round-trip routing, auto-rerouting, Zepp Coach and PeakBeats training metrics |
| Safety & emergency features | Fall detection, SOS and siren features when configured | SOS tools and downloadable maps; requires appropriate setup and phone connectivity for supported communications |
| Diving / depth features | — | Freediving and scuba modes rated to 45 m; follow the manufacturer’s diving limits and safety guidance |
| Battery & durability | ||
| Battery capacity | 590 mAh | 48 mm: 700 mAh rated 44 mm: 500 mAh rated |
| Battery life | Up to 80 hours with Always-On Display off; up to 60 hours with Always-On Display on; up to 100 hours in Power Saving Mode | 48 mm: up to 25 days typical, 10 days heavy, 38 hours accurate GPS 44 mm: up to 17 days typical, 8 days heavy, 26 hours accurate GPS |
| Charging | WPC-based wireless charging | Magnetic charging base |
| Water resistance | 10 ATM | 10 ATM |
| Durability / certifications | IP68; MIL-STD-810H | Rugged outdoor construction with Grade 5 titanium controls and sapphire glass |
| Compatibility | ||
| Phone compatibility | Android 11 or later with more than 1.5 GB RAM and Google Mobile Services; compatibility varies by market and device | Android 7.0 or later; iOS 15.0 or later |
| Companion app | Galaxy Wearable and Samsung Health | Zepp app |
| Colors | Titanium Gray; Titanium White; Titanium Silver | Black Gold (44mm), Black Gold (48mm); Gold/Grey, Tactical Black |
Related comparisons
Apple Watch Series 8Samsung Galaxy Watch UltraApple Watch Ultra 2Samsung Galaxy Watch UltraApple Watch UltraSamsung Galaxy Watch UltraApple Watch Series 9Samsung Galaxy Watch Ultra
AmazFit FalconSamsung Galaxy Watch Ultra
AmazFit T-Rex UltraSamsung Galaxy Watch UltraSamsung Galaxy Watch Ultra
Google Pixel Watch 3Samsung Galaxy Watch Ultra
Apple Watch Series 10Samsung Galaxy Watch Ultra
Huawei Watch GT 5 ProSamsung Galaxy Watch Ultra
Apple Watch Ultra 3