Polar M400 vs. Samsung Gear S2 vs. Garmin Vivosmart 3 vs. Xiaomi Mi Band
 | | | | |
| PolarM400Remove Buy Now | SamsungGear S2Remove Buy Now | GarminVivosmart 3Remove Buy Now | XiaomiMi BandRemove Buy Now |
Basic Info | ||||
| Suggested Price | $200 | $300 | $139.99 | $15 |
| Release | 2014 | 2015 | 2017 | 2015 |
Activity & Fitness | ||||
| Calories | ||||
| Cycling (Bicycling) | ||||
| Distance | ||||
| Heart | n/a | |||
| Oxygen | ||||
| Sleep | ||||
| Steps | ||||
| Swim | ||||
Battery | ||||
| Duration | 8 hours to 30 days | 2-3 days | 5 days | 30 days |
| Rechargeable | ||||
Compatibility | ||||
| Android | ||||
| iOS | ||||
| Windows Phone | n/a | n/a | ||
| Mac | n/a | NA | ||
| Windows | n/a | NA | ||
Connectivity | ||||
| Bluetooth | ||||
| Cellular | n/a | |||
| GPS | n/a | |||
| NFC | ||||
| Wi-Fi | ||||
Display | ||||
| Color | NA | |||
| Resolution | n/a | 360 x 360 | 64 x 128 | NA |
| Size | n/a | 1.2 inches | NA | NA |
| Touch | NA | |||
| Type | n/a | Super AMOLED | OLED | NA |
Functions | ||||
| Audio Speaker | Alerts only | |||
| Clock | ||||
| Phone | ||||
| Vibration | ||||
| Voice | ||||
Hardware | ||||
| Accelerometer | ||||
| Barometer or Altimeter | ||||
| Ultraviolet Sensor | ||||
| Water Resistance | 3 ATM | IP68 | 5 ATM | IP67 |
Notifications | ||||
| Phone | ||||
| Emails | ||||
| Texts | ||||
Software | ||||
| Operating System | n/a | Tizen | NA | |
| Apps | ||||
| Music | ||||