Amazfit T-Rex 3 Pro vs Samsung Galaxy Watch Ultra 2025
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Apple Watch UltraKSh 90,000.00
Apple Watch Ultra 2KSh 103,500.00
Apple Watch Series 9 Price range: KSh 45,000.00 through KSh 49,500.00
Apple Watch Series 8 Price range: KSh 50,000.00 through KSh 53,000.00
At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Amazfit T-Rex 3 Pro |  Samsung Galaxy Watch Ultra 2025 |
|---|---|---|
| Price | Price range: KSh 55,000.00 through KSh 65,000.00 | KSh 43,500.00 |
| Display | AMOLED 48 mm: 1.5-inch 44 mm: 1.32-inch | 1.5-inch Super AMOLED |
| Battery capacity | 48 mm: 700 mAh rated 44 mm: 500 mAh rated | 590 mAh |
| Water resistance | 10 ATM | 10 ATM |
| Processor | — | Exynos W1000 (3 nm) |
| RAM | — | 2 GB |
| Storage | — | 64 GB |
| Operating system | Zepp OS 5 | Wear OS Powered by Samsung; One UI 8 Watch |
| Network / cellular | — | 3G UMTS and 4G LTE; availability varies by carrier and region |
| Positioning / GNSS | Built-in six-satellite positioning with circularly polarized GPS antenna | Built-in dual-frequency L1 + L5 GPS; GPS, GLONASS, BeiDou and Galileo |
| Health & wellness features | Heart rate, blood oxygen, stress, HRV, readiness and temperature insights; wellness measurements are not intended for medical diagnosis | Heart-rate monitoring, ECG, blood pressure, body composition, blood oxygen, skin temperature, Energy Score, Antioxidant Index and Vascular Load; availability varies by market and paired phone |
Full specifications
2 of 4 products
| Specification | Amazfit T-Rex 3 Pro | Samsung Galaxy Watch Ultra 2025 |
|---|---|---|
| Identity & design | ||
| Brand | Amazfit | Samsung |
| Model | T-Rex 3 Pro | Galaxy Watch Ultra (2025) |
| Announced | — | July 2025 |
| Dimensions | 48 mm: 48 × 48 × 14 mm 44 mm: 44.8 × 44.8 × 13.2 mm Heart-rate sensor base excluded | 47.4 × 47.1 × 12.1 mm |
| Weight | 48 mm: 52 g 44 mm: 46.8 g Without strap | 60.5 g |
| Build materials | Fiber-reinforced polymer case with Grade 5 titanium bezel and buttons; sapphire-glass touchscreen | Grade 4 titanium case; sapphire-crystal display |
| 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 | Four physical buttons and touchscreen | Touchscreen; Quick button; Home and Back buttons; Double Pinch gesture |
| Display | ||
| Display | AMOLED 48 mm: 1.5-inch 44 mm: 1.32-inch | 1.5-inch Super AMOLED |
| Screen resolution | 48 mm: 480 × 480 pixels, 322 ppi 44 mm: 466 × 466 pixels, 353 ppi | 480 × 480 pixels |
| Display protection | Sapphire glass | Sapphire crystal |
| Display features | Up to 3,000 nits peak brightness; always-on display | Full-colour Always-On Display; up to 3,000 nits |
| Performance & software | ||
| Processor | — | Exynos W1000 (3 nm) |
| CPU | — | 5-core CPU up to 1.6 GHz |
| RAM | — | 2 GB |
| Storage | — | 64 GB |
| Operating system | Zepp OS 5 | Wear OS Powered by Samsung; One UI 8 Watch |
| Connectivity | ||
| Network / cellular | — | 3G UMTS and 4G LTE; availability varies by carrier and region |
| SIM / eSIM | — | eSIM |
| Wi-Fi | 2.4 GHz Wi-Fi | 802.11a/b/g/n, 2.4 GHz and 5 GHz |
| Bluetooth | Bluetooth 5.2 BLE | Bluetooth 5.3 |
| NFC | — | Supported |
| Positioning / GNSS | Built-in six-satellite positioning with circularly polarized GPS antenna | Built-in dual-frequency L1 + L5 GPS; GPS, GLONASS, BeiDou and Galileo |
| Audio & communication | ||
| Speaker | Built-in speaker | Speaker and siren |
| Microphone | Built-in microphone | Microphone |
| Calling | Bluetooth calling when paired with a compatible phone | Standalone LTE calling and Bluetooth calling; carrier support required |
| Sensors, health & fitness | ||
| Sensors | BioTracker 6.0 PPG biometric sensor (5PD + 2LED), accelerometer, gyroscope, geomagnetic sensor, barometric altimeter, ambient-light sensor and temperature sensor | Samsung BioActive Sensor (optical heart-rate, electrical heart and bioelectrical impedance analysis), infrared temperature sensor, accelerometer, barometer, gyroscope, geomagnetic sensor and light sensor |
| Health & wellness features | Heart rate, blood oxygen, stress, HRV, readiness and temperature insights; wellness measurements are not intended for medical diagnosis | Heart-rate monitoring, ECG, blood pressure, body composition, blood oxygen, skin temperature, Energy Score, Antioxidant Index and Vascular Load; availability varies by market and paired phone |
| Sleep tracking | Sleep stages, naps, sleep score, breathing quality and recovery insights | Sleep tracking, Bedtime Guidance, sleep coaching and sleep-apnoea features where available |
| Sports / workout modes | 187 sports modes with smart recognition for strength-training and sports movements | Multiple workout modes including multisport and automatic workout detection |
| Training & outdoor features | 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 | Dual-frequency GPS; GPX routes; Track Back; Running Coach; personalised heart-rate zones; Functional Threshold Power |
| Safety & emergency features | SOS tools and downloadable maps; requires appropriate setup and phone connectivity for supported communications | Fall detection, SOS and siren features when configured |
| Diving / depth features | Freediving and scuba modes rated to 45 m; follow the manufacturer’s diving limits and safety guidance | — |
| Battery & durability | ||
| Battery capacity | 48 mm: 700 mAh rated 44 mm: 500 mAh rated | 590 mAh |
| Battery life | 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 | 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 |
| Charging | Magnetic charging base | WPC-based wireless charging |
| Water resistance | 10 ATM | 10 ATM |
| Durability / certifications | Rugged outdoor construction with Grade 5 titanium controls and sapphire glass | IP68; MIL-STD-810H |
| Compatibility | ||
| Phone compatibility | Android 7.0 or later; iOS 15.0 or later | Android 12 or later with more than 1.5 GB RAM and Google Mobile Services; compatibility varies by market and device |
| Companion app | Zepp app | Galaxy Wearable and Samsung Health |
| Colors | Black Gold (44mm), Black Gold (48mm); Gold/Grey, Tactical Black | Titanium Blue; Titanium Gray; Titanium White; Titanium Silver |
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