Basic Info |
| Wear Type | Wristband | Wristband | |
| Price | $23914 | $18000 | Polar M400 is 130% cheaper |
| Ratings | | | |
Activity & Fitness |
| Activity | Yes | Yes | Both track daily activity |
| Calories | Yes | Yes | Both track calories burned |
| Sleep | Yes | Yes | Both track sleep pattern |
| Heart Rate / Pulse | Yes | No | Amazfit Stratos tracks heart rate |
| External HR Monitor | No | Yes | |
| VO2 Max | Yes | Yes | Both show how well your body uses oxygen |
| Distance | Yes | Yes | Both track your stride length |
| Steps | Yes | Yes | Both track and count your steps |
| Pace | No | Yes | |
| Stairs / Floors | Yes | Yes | Both track elevation, climbing stairs or floors |
| Exercise Tagging | Yes | No | Only Amazfit Stratos provides exercise tagging |
| Smart Coach | No | Yes | Polar M400 provides real time fitness coaching |
| Goal Setting | Yes | Yes | Both can help with your goals setting |
| Inactivity Alert | Yes | Yes | Both have move reminders |
Additional Features |
| GPS | Yes | Yes | Both have integrated GPS modules |
| Glonass | Yes | No | |
| Navigation | Yes | No | Amazfit Stratos has onboard GPS navigation |
| Compass | Yes | No | Amazfit Stratos has a compass |
| Watch / Clock | Yes | Yes | Both have watch |
| Alarm Clock | Yes | Yes | Both have alarm clock |
| Reminders | Yes | Yes | Both have reminder app |
| Stopwatch | Yes | No | Amazfit Stratos has a stopwatch |
| Music Playback | Yes | No | Only Amazfit Stratos offers phone-free music |
| Weather | Yes | No | *Weather forecast |
| Reports | Activity, Sleep | Activity, Sleep | |
Smartphone Remote Features |
| Notifications | Yes | Yes | Both show smartphone notifications |
| Caller ID | Yes | Yes | Both show caller ID notification |
| Music Control | Yes | No | Amazfit Stratos allows control smartphone music player |
| Call Control | No | Yes | Polar M400 allows you control phone calls |
| Camera Control | No | No | Both don't have camera control |
| Find Phone | Yes | No | Amazfit Stratos allows you to locate your phone |
Battery |
| Duration | 5 days | 24 days | Polar M400 battery life is about 4.8 times longer |
| Battery Type | Rechargeable Battery | Rechargeable Battery | |
Physical Specs |
| Weather Resistance | Yes | Yes | |
| Waterproof | Yes | No | |
| IP Rating | 5 ATM | 3 ATM | |
| Weight | 60 grams | 57 grams | Polar M400 is 3.0 g lighter |
User Interface |
| Display | LCD Screen | Yes | |
| Display Size | 1,34 inches | n/a | |
| Screen Resolution |
320 X 300 pixels
|
128 x 128 pixels
| |
| Color Display | Yes | No | |
| Touch Screen | Yes | No | |
| Sapphire glass | Yes | No | *Scratch resistant sapphire crystal glass |
Compatibility |
| Android | Yes | Yes | Both compatible with Android devices |
| iOS | Yes | Yes | Both compatible iOS devices |
| OS X/Mac | No | Yes | Polar M400 compatibles with MacBooks and iMacs |
| Windows Phone | No | Yes | Polar M400 compatibles with a range of Windows Phone devices |
| Windows | No | Yes | Polar M400 allows you to locate your phone |
| Web Portal | No | Yes | Polar M400 allows you upload and view data on the online portal |
| Social Features | No | Yes | You can integrate Polar M400 with social networks and share information |
Connectivity |
| Bluetooth | Yes | Yes | Both have Bluetooth data transfer technology |
| Wi-Fi | Yes | No | Select Amazfit Stratos if you need a built-in Wi-Fi connectivity |
| NFC | No | No | Both don't have NFC connectivity |
| ANT+ | No | No | Both don't provide ANT+ wireless technology |
| Buy on AmazonBuy on GearBest | Buy on Amazon | |
