Basic Info |
| Wear Type | Wristband | Wristband | |
| Price | $12100 | $23490 | Fitbit Charge 3 is 190% 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 | Yes | Both measure heart rate |
| VO2 Max | Yes | Yes | Both show how well your body uses oxygen |
| Distance | Yes | Yes | Both track your running/walking distance |
| Steps | Yes | Yes | Both track and count your steps |
| Pace | No | Yes | |
| Speed | No | Yes | |
| Stairs / Floors | Yes | Yes | Both track elevation, climbing stairs or floors |
| Exercise Tagging | Yes | Yes | Both have exercise tagging feature |
| Smart Coach | No | No | Both don't have coaching feature |
| Goal Setting | Yes | Yes | Both can help with your goals setting |
| Inactivity Alert | Yes | Yes | Both have move reminders |
Additional Features |
| GPS | No | Yes | Garmin Forerunner 645 has GPS support |
| Glonass | No | Yes | |
| Compass | No | Yes | 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 | No | Yes | Garmin Forerunner 645 has a stopwatch |
| Music Playback | No | No | Both don't have music playback |
| Temperature | No | Yes | |
| 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 | No | Yes | Garmin Forerunner 645 allows control smartphone music player |
| Call Control | No | Yes | Garmin Forerunner 645 allows you control phone calls |
| Camera Control | No | No | Both don't have camera control |
| Find Phone | No | Yes | Garmin Forerunner 645 allows you to locate your phone |
Battery |
| Duration | 7 days | 7 days | Both are the same battery life |
| Battery Type | Rechargeable Battery | Rechargeable Battery | |
Physical Specs |
| Weather Resistance | Yes | Yes | |
| Waterproof | Yes | Yes | |
| IP Rating | 5ATM | 5 ATM | |
| Weight | 30 grams | 42.2 grams | Fitbit Charge 3 is 12.2 g lighter |
User Interface |
| Display | OLED Screen | LCD Screen | |
| Display Size | n/a | 1,2 inches | |
| Screen Resolution |
n/a
|
240x240 pixels
| |
| Color Display | No | Yes | |
| Touch Screen | Yes | No | |
| Gorilla glass | No | Yes | *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 | No | Yes | Garmin Forerunner 645 compatibles with MacBooks and iMacs |
| Windows Phone | No | No | Both don't compatible with Windows Phone devices |
| Windows | No | Yes | Garmin Forerunner 645 allows you to locate your phone |
| Web Portal | No | Yes | Garmin Forerunner 645 allows you upload and view data on the online portal |
| Social Features | No | Yes | You can integrate Garmin Forerunner 645 with social networks and share information |
Connectivity |
| Bluetooth | Yes | Yes | Both have Bluetooth data transfer technology |
| Wi-Fi | Yes | Yes | Both have built-in Wi-Fi wireless connection |
| NFC | Yes | No | Only Fitbit Charge 3 has NFC (Near Field Communication) |
| ANT+ | No | Yes | Only Garmin Forerunner 645 has ANT+ wireless technology |
| Buy on Amazon | Buy on Amazon | |
