Polar M400 vs. Apple Watch vs. Samsung Gear 2 vs. Fitbit Charge 3 vs. Xiaomi Mi Band
 | | | | | |
| PolarM400Remove Buy Now | AppleWatchRemove Buy Now | SamsungGear 2Remove Buy Now | FitbitCharge 3Remove Buy Now | XiaomiMi BandRemove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $349 | $300 | $150 | $15 |
| Release | 2014 | 2015 | 2014 | 2018 | 2015 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | ||||
| Oxygen | |||||
| Sleep | |||||
| Steps | NA | ||||
| Swim | |||||
Battery | |||||
| Duration | 8 hours to 30 days | 18 hours | 2-3 days | 7 days | 30 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | NA | NA | ||
| Mac | NA | NA | NA | ||
| Windows | NA | NA | Not yet | NA | |
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | NA | ||||
| Wi-Fi | |||||
Display | |||||
| Color | NA | ||||
| Resolution | n/a | 340 x 272 or 390 x 312 | 320 x 320 | 66 x 18 | NA |
| Size | n/a | 1.5 inches or 1.65 inches | 1.63 inches | .721 inches | NA |
| Touch | NA | ||||
| Type | n/a | AMOLED | Super AMOLED | OLED | NA |
Functions | |||||
| Audio Speaker | Alerts only | Bluetooth | |||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | IPX7 | IP67 | 5 ATM | IP67 |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | n/a | Watch OS | Tizen OS | NA | NA |
| Apps | |||||
| Music | |||||