Polar M400 vs. Withings Go vs. Asus ZenWatch vs. Amazfit T-Rex
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| PolarM400Remove Buy Now | WithingsGoRemove Buy Now | AsusZenWatchRemove Buy Now | AmazfitT-RexRemove Buy Now |
Basic Info | ||||
| Suggested Price | $200 | $80 | $150 | $140 |
| Release | 2014 | 2016 | 2014 | 2019 |
Activity & Fitness | ||||
| Calories | ||||
| Cycling (Bicycling) | ||||
| Distance | ||||
| Heart | n/a | |||
| Oxygen | ||||
| Sleep | ||||
| Steps | ||||
| Swim | ||||
Battery | ||||
| Duration | 8 hours to 30 days | 8 months | NA | 20 days |
| Rechargeable | ||||
Compatibility | ||||
| Android | n/a | |||
| iOS | n/a | |||
| Windows Phone | n/a | n/a | NA | |
| Mac | n/a | NA | ||
| Windows | n/a | NA | ||
Connectivity | ||||
| Bluetooth | n/a | |||
| Cellular | ||||
| GPS | ||||
| NFC | ||||
| Wi-Fi | ||||
Display | ||||
| Color | n/a | |||
| Resolution | n/a | n/a | 320 x 320 | 360 x 360 |
| Size | n/a | n/a | 1.63 inches | 1.3 inches |
| Touch | n/a | |||
| Type | n/a | E-Ink | AMOLED | AMOLED |
Functions | ||||
| Audio Speaker | Alerts only | |||
| Clock | ||||
| Phone | n/a | |||
| Vibration | n/a | |||
| Voice | ||||
Hardware | ||||
| Accelerometer | ||||
| Barometer or Altimeter | ||||
| Ultraviolet Sensor | ||||
| Water Resistance | 3 ATM | 5 ATM | IP55 | 5 ATM |
Notifications | ||||
| Phone | n/a | |||
| Emails | n/a | NA | ||
| Texts | n/a | NA | ||
Software | ||||
| Operating System | n/a | n/a | Android Wear | Build-in |
| Apps | n/a | |||
| Music | ||||