Apple Watch Ultra 4: A3579; 49 mm natural titanium; translucent gray Ocean Band
Garmin fēnix 8 Pro 47 mm AMOLED: 010-03198-11 · sapphire, titanium; Graphite/black silicone band
| Specification | Apple Watch Ultra 4 | Garmin fēnix 8 Pro 47 mm AMOLED |
|---|---|---|
| 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 | 77 g with band Garmin |
| Display | LTPO3 OLED; 422 × 514 Apple | 1.4-inch AMOLED, 454 × 454; touchscreen Garmin |
| Brightness | 1 nit minimum; 3000 nits peak Apple | — |
| Chip | S11; dual-core 64-bit Apple | — |
| Storage | 64 GB Apple | 32 GB internal storage for maps and music Garmin |
| Health sensors | Electrical/optical heart; blood oxygen; temperature Apple | — |
| Outdoor sensors | Depth, water temperature, compass, altimeter Apple | — |
| Positioning | Precision dual-frequency GNSS Apple | — |
| 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 | — |
| Announcement and availability | — | Announced September 3, 2025; on sale from September 8, 2025 Garmin |
| Lens | — | Sapphire Garmin |
| Bezel and rear | — | Titanium Garmin |
| Dimensions | — | 47 × 47 × 16 mm Garmin |
| Smartwatch battery life | — | Gesture display: up to 15 days; always-on: 8 days Garmin |
| GPS battery life | — | GPS only: up to 44 hours; 33 hours with always-on display Garmin |
| Multi-band battery life | — | All systems + multi-band: up to 30 hours; 23 hours always-on Garmin |
| LTE LiveTrack battery life | — | All systems + multi-band + LTE LiveTrack: up to 12 hours; 11 hours always-on Garmin |
| Communication | — | Satellite messages/location; LTE Messenger calls and LiveTrack Garmin |
| Audio | — | Built-in microphone and speaker Garmin |
| Flashlight | — | White/red LED flashlight Garmin |
| Water and diving | — | 10 ATM; recreational diving features to 40 m Garmin |
| Temperature | — | Operating: −20–45 °C; charging: 0–45 °C Garmin |