Polar M400 vs. TomTom Spark vs. Fitbit Ionic vs. Asus VivoWatch vs. Amazfit T-Rex
 | | | | | |
| PolarM400Remove Buy Now | TomTomSparkRemove Buy Now | FitbitIonicRemove Buy Now | AsusVivoWatchRemove Buy Now | AmazfitT-RexRemove Buy Now |
Basic Info | |||||
| Suggested Price | $200 | $150 | $299 | $160 | $140 |
| Release | 2014 | 2015 | 2017 | 2018 | 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 | 4+ days | 24 hours to 10 days | 20 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | n/a | NA | ||
| Mac | NA | ||||
| Windows | NA | ||||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | n/a | ||||
| Resolution | n/a | n/a | 348x250 | 128 x 128 | 360 x 360 |
| Size | n/a | n/a | 1.42 | NA | 1.3 inches |
| Touch | |||||
| Type | n/a | LCD | OLED | NA | AMOLED |
Functions | |||||
| Audio Speaker | Alerts only | Bluetooth | |||
| Clock | |||||
| Phone | n/a | ||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | NA | ||||
| Ultraviolet Sensor | |||||
| Water Resistance | 3 ATM | 5 ATM | 50m | IP67 | 5 ATM |
Notifications | |||||
| Phone | n/a | ||||
| Emails | n/a | ||||
| Texts | n/a | ||||
Software | |||||
| Operating System | n/a | n/a | Fitbit OS | KoodOS | Build-in |
| Apps | |||||
| Music | |||||