Basic Info |
| Wear Type | Wristband | Wristband | |
| Price | $18000 | | |
| Ratings | | | |
Activity & Fitness |
| Activity | Yes | Yes | Both track daily activity |
| Calories | Yes | Yes | Both show estimated calories burned |
| Sleep | Yes | Yes | Both can track your sleep |
| Heart Rate / Pulse | No | No | Both don't track heart rate |
| External HR Monitor | Yes | No | |
| VO2 Max | Yes | No | You can monitor your VO2 max with Polar M400 |
| Distance | Yes | Yes | Both track your stride length |
| Steps | Yes | Yes | Both track how many steps you take |
| Pace | Yes | No | |
| Stairs / Floors | Yes | No | Polar M400 counts your climbing stairs or floors |
| Exercise Tagging | No | Yes | Only TomTom Spark 3 provides exercise tagging |
| Smart Coach | Yes | Yes | Both can help with smart coaching |
| Goal Setting | Yes | Yes | Both can help with your goals setting |
| Inactivity Alert | Yes | n/a | Polar M400 helps you stay active with inactivity alert |
Additional Features |
| GPS | Yes | Yes | Both have integrated GPS modules |
| Compass | No | n/a | Both don't have a compass |
| Watch / Clock | Yes | Yes | Both have watch |
| Alarm Clock | Yes | Yes | Both have alarm clock |
| Reminders | Yes | No | Polar M400 has a reminder option |
| Stopwatch | No | No | Both don't have stopwatch |
| Music Playback | No | n/a | Both don't have music playback |
| Reports | Activity, Sleep | Activity, Sleep | |
Smartphone Remote Features |
| Notifications | Yes | No | If you get a phone notification, Polar M400 make an alert for you |
| Caller ID | Yes | No | Polar M400 can notify you who is calling |
| Music Control | No | Yes | TomTom Spark 3 allows control smartphone music player |
| Call Control | Yes | n/a | Polar M400 allows you control phone calls |
| Camera Control | No | n/a | Both don't have camera control |
| Find Phone | No | n/a | Both don't have a find phone feature |
Battery |
| Duration | 24 days | 21 days | Polar M400 battery life is about 1.1 times longer |
| Battery Type | Rechargeable Battery | Rechargeable Battery | |
Physical Specs |
| Weather Resistance | Yes | Yes | |
| Waterproof | No | Yes | |
| IP Rating | 3 ATM | n/a | |
| Weight | 57 grams | 49 grams | TomTom Spark 3 is 8.0 g lighter |
User Interface |
| Display | Yes | LCD Screen | |
| Display Size | n/a | n/a | |
| Screen Resolution |
128 x 128 pixels
|
n/a
| |
| Color Display | No | n/a | |
| Touch Screen | No | n/a | |
Compatibility |
| Android | Yes | Yes | Both compatible with Android devices |
| iOS | Yes | Yes | Both compatible iOS devices |
| OS X/Mac | Yes | No | Polar M400 compatibles with MacBooks and iMacs |
| Windows Phone | Yes | No | Polar M400 compatibles with a range of Windows Phone devices |
| Windows | Yes | No | Polar M400 allows you to locate your phone |
| Web Portal | Yes | Yes | Both have access to online web portal |
| Social Features | Yes | n/a | You can integrate Polar M400 with social networks and share information |
Connectivity |
| Bluetooth | Yes | Yes | Both have Bluetooth data transfer technology |
| Wi-Fi | No | No | Both don't have Wi-Fi connection |
| NFC | No | No | Both don't have NFC connectivity |
| ANT+ | No | No | Both don't provide ANT+ wireless technology |
| Buy on Amazon | Buy on Amazon | |
