Basic Info |
| Wear Type | Wristband | Wristband | |
| Price | | | |
| 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 | No | Jawbone UP4 has the heart rate monitoring sensor |
| Distance | Yes | Yes | Both track your running/walking distance |
| Steps | Yes | Yes | Both track how many steps you take |
| Stairs / Floors | No | No | Both don't track climbing stairs or floors |
| Exercise Tagging | No | Yes | Only Polar Loop Crystal 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 | n/a | n/a | Both don't have inactivity alerts |
Additional Features |
| GPS | No | No | Both don't have built-in GPS support |
| Compass | n/a | n/a | Both don't have a compass |
| Watch / Clock | No | Yes | Only Polar Loop Crystal has a watch |
| Alarm Clock | Yes | Yes | Both have alarm clock |
| Reminders | Yes | Yes | Both have reminder app |
| Stopwatch | No | No | Both don't have stopwatch |
| Music Playback | n/a | n/a | Both don't have music playback |
| Reports | Activity, Sleep | Activity, Sleep | |
Smartphone Remote Features |
| Notifications | No | Yes | If you get a phone notification, Polar Loop Crystal make an alert for you |
| Caller ID | No | No | Both don't show caller ID notification |
| Music Control | No | No | Both don't have phone music control |
| Call Control | n/a | n/a | Both don't have call control |
| Camera Control | n/a | n/a | Both don't have camera control |
| Find Phone | n/a | n/a | Both don't have a find phone feature |
Battery |
| Duration | 7 days | 8 days | Polar Loop Crystal battery life is about 1.1 times longer |
| Battery Type | Rechargeable Battery | n/a | |
Physical Specs |
| Weather Resistance | Yes | Yes | |
| Waterproof | No | No | |
| IP Rating | n/a | n/a | |
| Weight | 29 grams | 38 grams | Jawbone UP4 is 9.0 g lighter |
User Interface |
| Display | LED Lights | LED Lights | |
| Display Size | n/a | n/a | |
| Screen Resolution |
n/a
|
n/a
| |
| Color Display | n/a | n/a | |
| Touch Screen | n/a | n/a | |
Compatibility |
| Android | Yes | Yes | Both compatible with Android devices |
| iOS | Yes | Yes | Both compatible iOS devices |
| OS X/Mac | No | Yes | Polar Loop Crystal compatibles with MacBooks and iMacs |
| Windows Phone | No | No | Both don't compatible with Windows Phone devices |
| Windows | No | Yes | Polar Loop Crystal allows you to locate your phone |
| Web Portal | Yes | Yes | Both have access to online web portal |
| Social Features | n/a | n/a | Both don't have social features |
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 | |
