Polar M400 vs. Amazfit Bip vs. Samsung Gear 2 vs. Garmin Vivofit 4 vs. Xiaomi Mi Band 3
 | | | | | |
| PolarM400Remove Buy Now | AmazfitBipRemove Buy Now | SamsungGear 2Remove Buy Now | GarminVivofit 4Remove Buy Now | XiaomiMi Band 3Remove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $99.99 | $300 | $79.95 | $44.95 |
| Release | 2014 | 2018 | 2014 | 2018 | 2018 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | ||||
| Oxygen | |||||
| Sleep | |||||
| Steps | NA | ||||
| Swim | |||||
Battery | |||||
| Duration | 8 hours to 30 days | 30 days | 2-3 days | 1 year | 20 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | NA | |||
| Mac | NA | ||||
| Windows | NA | ||||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | |||||
| Resolution | n/a | 176 x 176 | 320 x 320 | 88 x 88 | 128 x 80 |
| Size | n/a | 1.28 inches | 1.63 inches | NA | 0.78 inches |
| Touch | |||||
| Type | n/a | NA | Super AMOLED | NA | OLED |
Functions | |||||
| Audio Speaker | Alerts only | Bluetooth | |||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | IP68 | IP67 | 5 ATM | 5 ATM |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | n/a | Tizen OS | |||
| Apps | |||||
| Music | |||||