Polar M400 vs. Fitbit Alta vs. Withings Go vs. Apple Watch Series 2 vs. Xiaomi Mi Band 3
 | | | | | |
| PolarM400Remove Buy Now | FitbitAltaRemove Buy Now | WithingsGoRemove Buy Now | AppleWatch Series 2Remove Buy Now | XiaomiMi Band 3Remove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $130 | $80 | $269 | $44.95 |
| Release | 2014 | 2016 | 2016 | 2016 | 2018 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | ||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 8 hours to 30 days | 5 days | 8 months | 18 hours | 20 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | n/a | ||||
| iOS | n/a | ||||
| Windows Phone | n/a | n/a | |||
| Mac | n/a | ||||
| Windows | n/a | ||||
Connectivity | |||||
| Bluetooth | n/a | ||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | n/a | ||||
| Resolution | n/a | n/a | n/a | 340 x 272 or 390 x 312 | 128 x 80 |
| Size | n/a | n/a | n/a | 1.5 inches or 1.65 inches | 0.78 inches |
| Touch | n/a | n/a | |||
| Type | n/a | OLED | E-Ink | AMOLED | OLED |
Functions | |||||
| Audio Speaker | Alerts only | ||||
| Clock | |||||
| Phone | n/a | ||||
| Vibration | n/a | ||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | n/a | 5 ATM | 5ATM | 5 ATM |
Notifications | |||||
| Phone | n/a | ||||
| Emails | n/a | n/a | |||
| Texts | n/a | ||||
Software | |||||
| Operating System | n/a | n/a | n/a | Watch OS | |
| Apps | n/a | ||||
| Music | |||||