Polar M400 vs. Withings Activite Steel vs. Asus VivoWatch vs. Michael Kors Access Sofie HR vs. Amazfit T-Rex
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| PolarM400Remove Buy Now | WithingsActivite SteelRemove Buy Now | AsusVivoWatchRemove Buy Now | Michael KorsAccess Sofie HRRemove Buy Now | AmazfitT-RexRemove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $170 | $160 | $395 | $140 |
| Release | 2014 | 2015 | 2018 | 2019 | 2019 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | ||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 8 hours to 30 days | 8 months | 24 hours to 10 days | 2 days | 20 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | n/a | NA | ||
| Mac | n/a | NA | |||
| Windows | n/a | NA | |||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | |||||
| Resolution | n/a | n/a | 128 x 128 | 390 x 390 | 360 x 360 |
| Size | n/a | 1.3 inches | NA | 1.19 inches | 1.3 inches |
| Touch | |||||
| Type | n/a | Analog | NA | OMOLED | AMOLED |
Functions | |||||
| Audio Speaker | Alerts only | ||||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | NA | ||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | 5 ATM | IP67 | 0.3 ATM | 5 ATM |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | n/a | n/a | KoodOS | Wear OS | Build-in |
| Apps | |||||
| Music | |||||