Apple Watch Series 3 vs. Polar M400 vs. Fitbit Flex 2 vs. Fitbit One vs. Polar A370
 | | | | | |
| AppleWatch Series 3Remove Buy Now | PolarM400Remove Buy Now | FitbitFlex 2Remove Buy Now | FitbitOneRemove Buy Now | PolarA370Remove Buy Now |
Basic Info | |||||
| Suggested Price | $329 | $200 | $100 | $100 | $179.95 |
| Release | 2017 | 2014 | 2016 | 2012 | 2017 |
Activity & Fitness | |||||
| Calories | |||||
| Cycling (Bicycling) | |||||
| Distance | |||||
| Heart | n/a | ||||
| Oxygen | |||||
| Sleep | |||||
| Steps | |||||
| Swim | |||||
Battery | |||||
| Duration | 18 hours | 8 hours to 30 days | 5 days | 10-14 days | Up to 3 days |
| Rechargeable | |||||
Compatibility | |||||
| Android | |||||
| iOS | |||||
| Windows Phone | n/a | n/a | n/a | ||
| Mac | |||||
| Windows | |||||
Connectivity | |||||
| Bluetooth | |||||
| Cellular | |||||
| GPS | |||||
| NFC | |||||
| Wi-Fi | |||||
Display | |||||
| Color | n/a | ||||
| Resolution | 340 x 272 or 390 x 312 | n/a | n/a | n/a | 160 x 80 |
| Size | 1.5 inches or 1.65 inches | n/a | n/a | n/a | 1.18 inches |
| Touch | n/a | ||||
| Type | AMOLED | n/a | LED | OLED | TFT LCD |
Functions | |||||
| Audio Speaker | Alerts only | ||||
| Clock | |||||
| Phone | |||||
| Vibration | |||||
| Voice | |||||
Hardware | |||||
| Accelerometer | |||||
| Barometer or Altimeter | |||||
| Ultraviolet Sensor | |||||
| Water Resistance | 5 ATM | 3 ATM | 5 ATM | Splast Resistant | WR30 |
Notifications | |||||
| Phone | |||||
| Emails | |||||
| Texts | |||||
Software | |||||
| Operating System | WatchOS 4 | n/a | n/a | n/a | |
| Apps | |||||
| Music | |||||