Polar M400 vs. Samsung Gear S vs. TomTom Spark vs. Acer Liquid Leap vs. Xiaomi Mi Band 4
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| PolarM400Remove Buy Now | SamsungGear SRemove Buy Now | TomTomSparkRemove Buy Now | AcerLiquid LeapRemove Buy Now | XiaomiMi Band 4Remove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $250 | $150 | $90 | $25 |
| Release | 2014 | 2013 | 2015 | 2015 | 2019 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | n/a | |||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 8 hours to 30 days | n/a | n/a | 5 to 7 days | 20 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | n/a | n/a | ||
| Mac | n/a | ||||
| Windows | n/a | ||||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | n/a | ||||
| Resolution | n/a | 480 x 360 | n/a | 128 x 32 | 120x240 |
| Size | n/a | 2 inches | n/a | 1 inch | 0.95 inches |
| Touch | |||||
| Type | n/a | Super AMOLED | LCD | OLED | AMOLED |
Functions | |||||
| Audio Speaker | Alerts only | Bluetooth | |||
| Clock | |||||
| Phone | n/a | ||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | IP67 | 5 ATM | IPX4 | 5 ATM |
Notifications | |||||
| Phone | n/a | ||||
| Emails | n/a | ||||
| Texts | n/a | ||||
Software | |||||
| Operating System | n/a | Tizen | n/a | AMAZFIT OS | |
| Apps | |||||
| Music | |||||