Garmin 645 Music vs. Diesel On Full Guard 2.5 vs. Amazfit T-Rex vs. Apple Watch 8 vs. Apple Watch Ultra
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| Garmin645 MusicRemove Buy Now | DieselOn Full Guard 2.5Remove Buy Now | AmazfitT-RexRemove Buy Now | AppleWatch 8Remove Buy Now | AppleWatch UltraRemove Buy Now |
Basic Info | |||||
| Suggested Price | $450 | $325 | $140 | $499 | $799 |
| Release | 2018 | 2018 | 2019 | 2022 | 2022 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | |||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 7 days | 4 days | 20 days | 18 hrs | 36 hrs |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | |||||
| Mac | |||||
| Windows | |||||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | |||||
| Resolution | 240 x 240 | 454x454 | 360 x 360 | 340 x 272 or 390 x 312 | 502x410 pixels |
| Size | 1.2 inches | 1.39 inches | 1.3 inches | 1.5 inches or 1.65 inches | 1.92 inches |
| Touch | |||||
| Type | MIP | AMOLED | AMOLED | ||
Functions | |||||
| Audio Speaker | |||||
| Clock | LTPO OLED Retina | ||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 5 ATM | 3 ATM | 5 ATM | 5 ATM | 10 ATM (100 Meters) |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | Wear OS | Build-in | WatchOS 9 | WatchOS 9 | |
| Apps | |||||
| Music | |||||