AmazFit T-Rex Ultra vs Amazfit Balance 2
Compare specifications, current prices and availability. Choose up to four products from the same family.
Selected Item  AmazFit T-Rex Ultra Original price was: KSh 50,000.00.KSh 47,000.00Current price is: KSh 47,000.00. |  Amazfit Balance 2 Original price was: KSh 42,000.00.KSh 39,000.00Current price is: KSh 39,000.00.Buy now |
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At a glance
Key specifications and important differences. Full details follow below.
| Feature | AmazFit T-Rex Ultra | Amazfit Balance 2 |
|---|---|---|
| Price | Original price was: KSh 50,000.00.KSh 47,000.00Current price is: KSh 47,000.00. | Original price was: KSh 42,000.00.KSh 39,000.00Current price is: KSh 39,000.00. |
| Display | 1.39-inch AMOLED | 1.5-inch AMOLED touchscreen |
| Battery capacity | 500 mAh rated | 658 mAh rated |
| Water resistance | 10 ATM; ISO 22810:2010 | 10 ATM; suitable for swimming and supported diving activities subject to manufacturer guidance |
| Storage | Up to 2.3 GB available for music | 32GB |
| Operating system | Zepp OS 3.5 | Zepp OS 6 |
| Network / cellular | — | No |
| Positioning / GNSS | Built-in dual-band L1/L5 positioning; six satellite systems | Dual-band, six-satellite positioning with circularly polarized GPS antenna |
| Health & wellness features | 24-hour heart-rate, blood-oxygen and stress monitoring; one-tap measurement; PAI; breathing exercises; health alerts | 24/7 heart rate, blood oxygen, stress, HRV, BioCharge, LifeLoad, training load and recovery insights; wellness measurements are not intended for medical diagnosis |
Full specifications
2 of 4 products
| Specification | AmazFit T-Rex Ultra | Amazfit Balance 2 |
|---|---|---|
| Identity & design | ||
| Brand | Amazfit | Amazfit |
| Model | Amazfit T-Rex Ultra | Balance 2 |
| Announced | — | June 24, 2025 |
| Dimensions | 47.3 × 47.3 × 13.45 mm, excluding heart-rate sensor base | 47.4 × 47.4 × 12.3 mm (heart-rate sensor base excluded) |
| Weight | 89 g without strap | 43 g without strap |
| Build materials | 316L stainless-steel bezel, back panel, bridge and buttons; polymer-alloy middle frame | Aluminum-alloy frame, fiber-reinforced polymer case and sapphire-glass touchscreen |
| Wrist size | 140–205 mm | 140–210 mm |
| Strap / band | 22 mm silicone strap with classic pin buckle | 22 mm silicone strap with classic pin buckle; additional Lava strap included with applicable package |
| Controls / buttons | Four physical buttons; glass touchscreen | Two physical buttons and touchscreen |
| Display | ||
| Display | 1.39-inch AMOLED | 1.5-inch AMOLED touchscreen |
| Screen resolution | 454 × 454 pixels, 326 ppi | 480 × 480 pixels, 323 ppi |
| Display protection | Glass | Sapphire glass |
| Display features | Up to 1,000 nits; Always-On Display; 120+ watch faces | Up to 2,000 nits peak brightness; peak brightness is unavailable below 30% battery |
| Performance & software | ||
| Storage | Up to 2.3 GB available for music | 32GB |
| Operating system | Zepp OS 3.5 | Zepp OS 6 |
| Connectivity | ||
| Network / cellular | — | No |
| SIM / eSIM | — | No |
| Wi-Fi | 2.4 GHz Wi-Fi | 2.4 GHz Wi-Fi |
| Bluetooth | Bluetooth 5.0 BLE | Bluetooth 5.2 BLE |
| NFC | — | Yes |
| Positioning / GNSS | Built-in dual-band L1/L5 positioning; six satellite systems | Dual-band, six-satellite positioning with circularly polarized GPS antenna |
| Ultra Wideband (UWB) | — | No |
| Satellite features | — | No |
| Audio & communication | ||
| Speaker | No built-in speaker; audio through connected Bluetooth headphones | Two built-in speakers |
| Microphone | — | Built-in microphone |
| Calling | — | Bluetooth phone calls when paired with a compatible phone |
| Sensors, health & fitness | ||
| Sensors | BioTracker PPG biometric sensor with SpO₂; accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient-light sensor | BioTracker 6.0 PPG biometric sensor (5PD + 2LED), accelerometer, gyroscope, barometric altimeter, ambient-light sensor, geomagnetic sensor and temperature sensor |
| Health & wellness features | 24-hour heart-rate, blood-oxygen and stress monitoring; one-tap measurement; PAI; breathing exercises; health alerts | 24/7 heart rate, blood oxygen, stress, HRV, BioCharge, LifeLoad, training load and recovery insights; wellness measurements are not intended for medical diagnosis |
| Sleep tracking | Sleep stages including REM; naps; sleep schedule; breathing quality; sleep score | Sleep stages, naps, sleep score, sleep HRV and recovery insights |
| Sports / workout modes | 162 sports modes; smart recognition of 25 strength movements and 8 sports movements; freediving workouts | More than 170 sports modes with strength training and official HYROX modes |
| Training & outdoor features | Offline maps and route navigation; Zepp Coach; PeakBeats; Track Run; trajectory correction; Virtual Pacer; training templates and intervals; external heart-rate belt and cycling power meter; altitude, sun, moon and tide tools | Zepp Coach, downloadable base, ski and golf-course maps, turn-by-turn navigation, route tools and support for compatible workout peripherals |
| Safety & emergency features | Storm warnings; altitude blood-oxygen reminders; abnormal heart-rate, low-SpO₂ and high-stress alerts | — |
| Diving / depth features | Outdoor and indoor freediving and spearfishing; depth and water-temperature data; rated to 30 m; EN13319 and ISO 6425 diving certifications | Scuba-diving support; follow the manufacturer’s dive-mode limits and safety guidance |
| Battery & durability | ||
| Battery capacity | 500 mAh rated | 658 mAh rated |
| Battery life | Typical: up to 20 days; saver: 25 days; clock: 50 days; heavy: 9 days; accuracy GPS: 28 h; automatic GPS: 46 h; power-saving GPS: 58 h; endurance GPS: 80 h; low-temperature GPS: 10 h | Up to 21 days typical use, 10 days heavy use, 33 hours accurate GPS or 67 hours power-saving GPS |
| Charging | Magnetic charging base; approximately 2 hours | Magnetic charging head; approximately 2 hours; USB-C cable is not included |
| Water resistance | 10 ATM; ISO 22810:2010 | 10 ATM; suitable for swimming and supported diving activities subject to manufacturer guidance |
| Durability / certifications | Mud-resistant design; ultra-low-temperature mode down to −30 °C; SGS-certified 10 ATM testing; EN13319 and ISO 6425 diving certifications | MIL-STD-810G-2014 low-pressure, temperature, shock, vibration and impact tests; TUV water-resistance report 68.189.25.0132.01 |
| Compatibility | ||
| Phone compatibility | Android 7.0 or later; iOS 12.0 or later | Android 7.0 or later; iOS 15.0 or later |
| Companion app | Zepp App | Zepp app |
| Colors | Abyss Black; Sahara | Black with additional Lava strap |
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