Basic Info |
| Wear Type | Wristband | Wristband | |
| Price | $23490 | | |
| Ratings | | | |
Activity & Fitness |
| Activity | Yes | Yes | Both track daily activity |
| Calories | Yes | Yes | Both track calories burned |
| Sleep | Yes | Yes | Both can track your sleep |
| Heart Rate / Pulse | Yes | Yes | Both have built in heart rate sensor |
| VO2 Max | Yes | No | Garmin Forerunner 645 shows the maximum volume of oxygen you can consume per minute |
| Distance | Yes | Yes | Both track your stride length |
| Steps | Yes | Yes | Both track and count your steps |
| Pace | Yes | Yes | |
| Speed | Yes | Yes | |
| Stairs / Floors | Yes | Yes | Both track elevation, climbing stairs or floors |
| Exercise Tagging | Yes | Yes | Both have exercise tagging feature |
| Smart Coach | No | Yes | Polar M430 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 | |
| Compass | Yes | No | Garmin Forerunner 645 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 | Yes | Both have stopwatch |
| Music Playback | No | No | Both don't have music playback |
| Temperature | Yes | No | |
| 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 | Garmin Forerunner 645 allows control smartphone music player |
| Call Control | Yes | Yes | Both allow control phone calls |
| Camera Control | No | No | Both don't have camera control |
| Find Phone | Yes | No | Garmin Forerunner 645 allows you to locate your phone |
Battery |
| Duration | 7 days | 20 days | Polar M430 battery life is about 2.9 times longer |
| Battery Type | Rechargeable Battery | Rechargeable Battery | |
Physical Specs |
| Weather Resistance | Yes | Yes | |
| Waterproof | Yes | No | |
| IP Rating | 5 ATM | 3 ATM | |
| Weight | 42.2 grams | 51 grams | Garmin Forerunner 645 is 8.8 g lighter |
User Interface |
| Display | LCD Screen | LCD Screen | |
| Display Size | 1,2 inches | 1.4 inches | |
| Screen Resolution |
240x240 pixels
|
128 x 128 pixels
| |
| Color Display | Yes | No | |
| Touch Screen | No | No | |
| Gorilla glass | Yes | No | *Specialized toughened glass: thin, light and damage-resistant |
Compatibility |
| Android | Yes | Yes | Both compatible with Android devices |
| iOS | Yes | Yes | Both compatible iOS devices |
| OS X/Mac | Yes | Yes | Both compatible MAC OS X laptops and PCs |
| Windows Phone | No | No | Both don't compatible with Windows Phone devices |
| Windows | Yes | Yes | Both can help find your smartphone |
| Web Portal | Yes | No | Garmin Forerunner 645 allows you upload and view data on the online portal |
| Social Features | Yes | Yes | Both have social features |
Connectivity |
| Bluetooth | Yes | Yes | Both have Bluetooth data transfer technology |
| Wi-Fi | Yes | No | Select Garmin Forerunner 645 if you need a built-in Wi-Fi connectivity |
| NFC | No | No | Both don't have NFC connectivity |
| ANT+ | Yes | No | Only Garmin Forerunner 645 has ANT+ wireless technology |
| Buy on Amazon | Buy on Amazon | |
