Apple Watch Series 9 vs AmazFit T-Rex Ultra
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Amazfit T-Rex 3 Pro Price range: KSh 55,000.00 through KSh 65,000.00
Apple Watch Series 11 Price range: KSh 47,000.00 through KSh 51,500.00
Apple Watch Series 8 Price range: KSh 50,000.00 through KSh 53,000.00
Apple Watch SE 2 Price range: KSh 28,500.00 through KSh 32,000.00
At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Apple Watch Series 9 |  AmazFit T-Rex Ultra |
|---|---|---|
| Price | Price range: KSh 45,000.00 through KSh 49,500.00 | Original price was: KSh 50,000.00.KSh 47,000.00Current price is: KSh 47,000.00. |
| Display | Always-On Retina LTPO OLED | 1.39-inch AMOLED |
| Battery capacity | — | 500 mAh rated |
| Water resistance | Water resistant to 50 m under ISO 22810:2010 | 10 ATM; ISO 22810:2010 |
| Processor | Apple S9 SiP | — |
| Storage | 64 GB | Up to 2.3 GB available for music |
| Operating system | watchOS | Zepp OS 3.5 |
| Network / cellular | GPS + Cellular models support LTE and UMTS; availability varies by carrier and region | — |
| Positioning / GNSS | L1 GPS, GLONASS, Galileo, QZSS and BeiDou | Built-in dual-band L1/L5 positioning; six satellite systems |
| Health & wellness features | ECG app; blood oxygen feature where available; high and low heart-rate notifications; irregular rhythm notifications; temperature sensing; cycle tracking | 24-hour heart-rate, blood-oxygen and stress monitoring; one-tap measurement; PAI; breathing exercises; health alerts |
Full specifications
2 of 4 products
| Specification | Apple Watch Series 9 | AmazFit T-Rex Ultra |
|---|---|---|
| Identity & design | ||
| Brand | Apple | Amazfit |
| Model | Apple Watch Series 9 | Amazfit T-Rex Ultra |
| Announced | September 2023 | — |
| Dimensions | 45 mm: 45 × 38 × 10.7 mm 41 mm: 41 × 35 × 10.7 mm | 47.3 × 47.3 × 13.45 mm, excluding heart-rate sensor base |
| Weight | 45 mm: 38.7–51.5 g, depending on case and connectivity 41 mm: 31.9–42.3 g, depending on case and connectivity | 89 g without strap |
| Build materials | Aluminium or stainless-steel case, depending on configuration | 316L stainless-steel bezel, back panel, bridge and buttons; polymer-alloy middle frame |
| Wrist size | 45 mm: 140–245 mm wrist 41 mm: 130–200 mm wrist | 140–205 mm |
| Strap / band | — | 22 mm silicone strap with classic pin buckle |
| Controls / buttons | Digital Crown with haptic feedback; side button; touchscreen; Double Tap gesture | Four physical buttons; glass touchscreen |
| Display | ||
| Display | Always-On Retina LTPO OLED | 1.39-inch AMOLED |
| Screen resolution | 45 mm: 396 × 484 pixels 41 mm: 352 × 430 pixels | 454 × 454 pixels, 326 ppi |
| Display protection | Ion-X front glass on aluminium models; sapphire front crystal on stainless-steel models | Glass |
| Display features | Always-On display; up to 2,000 nits; 1 nit minimum brightness; 326 ppi | Up to 1,000 nits; Always-On Display; 120+ watch faces |
| Performance & software | ||
| Processor | Apple S9 SiP | — |
| CPU | 64-bit dual-core processor; 4-core Neural Engine | — |
| Storage | 64 GB | Up to 2.3 GB available for music |
| Operating system | watchOS | Zepp OS 3.5 |
| Connectivity | ||
| Network / cellular | GPS + Cellular models support LTE and UMTS; availability varies by carrier and region | — |
| SIM / eSIM | eSIM on GPS + Cellular models; carrier plan required | — |
| Wi-Fi | 802.11b/g/n, 2.4 GHz and 5 GHz | 2.4 GHz Wi-Fi |
| Bluetooth | Bluetooth 5.3 | Bluetooth 5.0 BLE |
| NFC | NFC with Apple Pay support | — |
| Positioning / GNSS | L1 GPS, GLONASS, Galileo, QZSS and BeiDou | Built-in dual-band L1/L5 positioning; six satellite systems |
| Ultra Wideband (UWB) | Second-generation Ultra Wideband chip | — |
| Audio & communication | ||
| Speaker | Speaker | No built-in speaker; audio through connected Bluetooth headphones |
| Microphone | Microphone | — |
| Calling | Bluetooth calling through a paired iPhone; cellular calling on GPS + Cellular models with an eligible plan | — |
| Sensors, health & fitness | ||
| Sensors | Electrical heart sensor; third-generation optical heart sensor; temperature sensor; compass; always-on altimeter; high-g accelerometer; high-dynamic-range gyroscope; ambient light sensor | BioTracker PPG biometric sensor with SpO₂; accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient-light sensor |
| Health & wellness features | ECG app; blood oxygen feature where available; high and low heart-rate notifications; irregular rhythm notifications; temperature sensing; cycle tracking | 24-hour heart-rate, blood-oxygen and stress monitoring; one-tap measurement; PAI; breathing exercises; health alerts |
| Sleep tracking | Sleep app with sleep stages | Sleep stages including REM; naps; sleep schedule; breathing quality; sleep score |
| Sports / workout modes | Workout app with multiple workout types and automatic workout detection | 162 sports modes; smart recognition of 25 strength movements and 8 sports movements; freediving workouts |
| Training & outdoor features | Pace and heart-rate zones; compass waypoints and backtrack | 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 |
| Safety & emergency features | Emergency SOS; international emergency calling; fall detection; crash detection | 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 |
| Battery & durability | ||
| Battery capacity | — | 500 mAh rated |
| Battery life | Up to 18 hours normal use; up to 36 hours in Low Power Mode | 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 |
| Charging | USB-C magnetic fast-charging cable | Magnetic charging base; approximately 2 hours |
| Water resistance | Water resistant to 50 m under ISO 22810:2010 | 10 ATM; ISO 22810:2010 |
| Durability / certifications | IP6X dust resistant | Mud-resistant design; ultra-low-temperature mode down to −30 °C; SGS-certified 10 ATM testing; EN13319 and ISO 6425 diving certifications |
| Compatibility | ||
| Phone compatibility | Requires iPhone XS or later with iOS 17 or later | Android 7.0 or later; iOS 12.0 or later |
| Companion app | Apple Watch app and Apple Health | Zepp App |
| Colors | Aluminium: Pink, Midnight, Starlight, Silver, (PRODUCT)RED Stainless steel: Gold, Silver, Graphite | Abyss Black; Sahara |
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