Apple Watch Ultra 4: A3579; 49 mm natural titanium; translucent gray Ocean Band
Amazfit Bip 6: Single case size: 1.97-inch AMOLED, 46.3 × 40.2 mm; Black, Charcoal, Stone and Red colours. There is no cellular (LTE) version; the larger Bip Max is a separate model.
| Specification | Apple Watch Ultra 4 | Amazfit Bip 6 |
|---|---|---|
| Release year | 2026 | 2025 |
| Announcement / availability | 9 / 18 September 2026 Apple | — |
| Case | Grade 5 titanium; sapphire front crystal Apple | — |
| Size | 49 × 44 × 12 mm Apple | — |
| Weight | Natural titanium case 63 g Apple | 27.9 g (without strap) Amazfit |
| Display | LTPO3 OLED; 422 × 514 Apple | 1.97-inch AMOLED, 390 × 450 pixels, 302 ppi; up to 2000 nits peak brightness; tempered glass with anti-fingerprint coating Amazfit |
| Brightness | 1 nit minimum; 3000 nits peak Apple | — |
| Chip | S11; dual-core 64-bit Apple | — |
| Storage | 64 GB Apple | — |
| Health sensors | Electrical/optical heart; blood oxygen; temperature Apple | — |
| Outdoor sensors | Depth, water temperature, compass, altimeter Apple | — |
| Positioning | Precision dual-frequency GNSS Apple | 5 satellite systems; built-in GPS Amazfit |
| Wireless | Wi-Fi 4, 2.4/5 GHz; Bluetooth 5.3; UWB Apple | — |
| Cellular | A3579: 5G RedCap and LTE Apple | — |
| Manufacturer battery test | Up to 50 hours normal use; 84 in Low Power Mode Apple | — |
| Charging | About 45 minutes to 80% Apple | — |
| Water / dust | 100 m rating; IP6X Apple | — |
| Diving limit | Recreational diving to 40 m Apple | — |
| Phone compatibility | iPhone 11 / SE 2 or later; iOS 27+ Apple | — |
| Case and strap | — | 46.3 × 40.2 × 10.45 mm; aluminium-alloy frame, fibre-reinforced polymer case; 22 mm liquid-silicone strap for 130–195 mm wrists, classic pin buckle; 2 buttons Amazfit |
| Water resistance | — | 5 ATM Amazfit |
| Battery | — | 340 mAh; 14 days typical use, 6 days heavy use, 26 days in battery saver mode, 32 hours of continuous GPS Amazfit |
| Sensors | — | BioTracker PPG biometric sensor (5 photodiodes + 2 LEDs); accelerometer, gyroscope, ambient light, magnetometer Amazfit |
| Connectivity and calls | — | Bluetooth 5.2 (BLE); microphone and speaker; Bluetooth calling, notifications and quick reply Amazfit |
| Sports and health | — | 140+ sports modes; automatic recognition of 25 strength exercises and 7 sports movements; 24-hour heart rate, blood-oxygen and stress monitoring; sleep stages and sleep breathing quality; Readiness score, PAI Amazfit |
| Compatibility | — | Android 7.0 and later, iOS 14.0 and later; Zepp app Amazfit |