Polar M400 vs. Polar M430 vs. Amazfit Cor vs. Michael Kors Grayson vs. Michael Kors Grayson vs. Apple Watch 7
 | | | | | | |
| PolarM400Remove Buy Now | PolarM430Remove Buy Now | AmazfitCorRemove Buy Now | Michael KorsGraysonRemove Buy Now | Michael KorsGraysonRemove Buy Now | AppleWatch 7Remove Buy Now |
Basic Info | ||||||
| Suggested Price | $200 | $255 | $79.99 | $350 | $350 | $429 |
| Release | 2014 | 2017 | 2018 | 2018 | 2018 | 2021 |
Activity & Fitness | ||||||
| Calories | ||||||
| Cycling (Bicycling) | ||||||
| Distance | ||||||
| Heart | n/a | |||||
| Oxygen | ||||||
| Sleep | ||||||
| Steps | ||||||
| Swim | ||||||
Battery | ||||||
| Duration | 8 hours to 30 days | 30 hours | 12 days | 24 hours | 24 hours | 18 Hours |
| Rechargeable | ||||||
Compatibility | ||||||
| Android | ||||||
| iOS | ||||||
| Windows Phone | n/a | |||||
| Mac | ||||||
| Windows | ||||||
Connectivity | ||||||
| Bluetooth | ||||||
| Cellular | ||||||
| GPS | ||||||
| NFC | ||||||
| Wi-Fi | ||||||
Display | ||||||
| Color | ||||||
| Resolution | n/a | 128x128 | 80 x 160 | 453 x 454 | 453x454 | 396 x 484 |
| Size | n/a | 1.4 inch | 1.23 inches | 1.39 inches | 1.39 inches | 1.9 inches |
| Touch | ||||||
| Type | n/a | LCD | IPS LCD | AMOLED | AMOLED | MicroLED |
Functions | ||||||
| Audio Speaker | Alerts only | |||||
| Clock | ||||||
| Phone | ||||||
| Vibration | ||||||
| Voice | ||||||
Hardware | ||||||
| Accelerometer | ||||||
| Barometer or Altimeter | ||||||
| Ultraviolet Sensor | ||||||
| Water Resistance | 3 ATM | WR30 | 5 ATM | 1 ATM | 1 ATM | water resistant but not waterproof |
Notifications | ||||||
| Phone | ||||||
| Emails | ||||||
| Texts | ||||||
Software | ||||||
| Operating System | n/a | Android Wear | Android Wear | WatchOS 8 | ||
| Apps | ||||||
| Music | ||||||