Polar M400 vs. Fitbit Zip vs. Amazfit Stratos
 | | | |
| PolarM400Remove Buy Now | FitbitZipRemove Buy Now | AmazfitStratosRemove Buy Now |
Basic Info | |||
| Suggested Price | $200 | $60 | $199 |
| Release | 2014 | 2012 | 2018 |
Activity & Fitness | |||
| Calories | |||
| Cycling (Bicycling) | |||
| Distance | |||
| Heart | n/a | ||
| Oxygen | |||
| Sleep | |||
| Steps | |||
| Swim | |||
Battery | |||
| Duration | 8 hours to 30 days | 6 months | 5 days |
| Rechargeable | |||
Compatibility | |||
| Android | |||
| iOS | |||
| Windows Phone | n/a | n/a | |
| Mac | |||
| Windows | |||
Connectivity | |||
| Bluetooth | |||
| Cellular | |||
| GPS | |||
| NFC | |||
| Wi-Fi | |||
Display | |||
| Color | |||
| Resolution | n/a | n/a | 320 x 300 |
| Size | n/a | n/a | 1.34 inches |
| Touch | |||
| Type | n/a | n/a | OLED |
Functions | |||
| Audio Speaker | Alerts only | ||
| Clock | |||
| Phone | |||
| Vibration | |||
| Voice | |||
Hardware | |||
| Accelerometer | |||
| Barometer or Altimeter | |||
| Ultraviolet Sensor | |||
| Water Resistance | 3 ATM | Splash Resistant | 5 ATM |
Notifications | |||
| Phone | |||
| Emails | |||
| Texts | |||
Software | |||
| Operating System | n/a | n/a | Proprietary |
| Apps | |||
| Music | |||