Polar M400 vs. Asus VivoWatch vs. Asus ZenWatch vs. Samsung Gear 2 vs. Amazfit T-Rex
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| PolarM400Remove Buy Now | AsusVivoWatchRemove Buy Now | AsusZenWatchRemove Buy Now | SamsungGear 2Remove Buy Now | AmazfitT-RexRemove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $160 | $150 | $300 | $140 |
| Release | 2014 | 2018 | 2014 | 2014 | 2019 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | ||||
| Oxygen | |||||
| Sleep | |||||
| Steps | NA | ||||
| Swim | |||||
Battery | |||||
| Duration | 8 hours to 30 days | 24 hours to 10 days | NA | 2-3 days | 20 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | NA | NA | NA | |
| Mac | NA | NA | NA | ||
| Windows | NA | NA | NA | ||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | |||||
| Resolution | n/a | 128 x 128 | 320 x 320 | 320 x 320 | 360 x 360 |
| Size | n/a | NA | 1.63 inches | 1.63 inches | 1.3 inches |
| Touch | |||||
| Type | n/a | NA | AMOLED | Super AMOLED | AMOLED |
Functions | |||||
| Audio Speaker | Alerts only | Bluetooth | |||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | NA | ||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | IP67 | IP55 | IP67 | 5 ATM |
Notifications | |||||
| Phone | |||||
| Emails | NA | ||||
| Texts | NA | ||||
Software | |||||
| Operating System | n/a | KoodOS | Android Wear | Tizen OS | Build-in |
| Apps | |||||
| Music | |||||