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 | No | Yes | U8 monitors your sleep pattern |
| Heart Rate / Pulse | Yes | No | Polar RS800CX has the heart rate monitoring sensor |
| Distance | Yes | Yes | Both track your stride length |
| Steps | No | Yes | U8 has built-in pedometer to count steps |
| Pace | Yes | No | |
| Speed | Yes | No | |
| Stairs / Floors | No | Yes | U8 has built-in altimeter for elevation feature |
| Exercise Tagging | No | No | Both don't have exercise tagging |
| Smart Coach | No | No | Both don't have coaching feature |
| Goal Setting | Yes | No | Set and keep your own daily or weekly goals with Polar RS800CX |
| Inactivity Alert | No | Yes | U8 helps you stay active with inactivity alert |
Additional Features |
| GPS | Yes | No | Polar RS800CX has GPS support |
| Compass | No | No | Both don't have a compass |
| Watch / Clock | Yes | Yes | Both have watch |
| Alarm Clock | No | Yes | U8 has a 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 | No | Yes | |
| Reports | Activity | Activity, Sleep | |
Smartphone Remote Features |
| Notifications | No | Yes | If you get a phone notification, U8 make an alert for you |
| Caller ID | No | Yes | U8 can notify you who is calling |
| Music Control | No | Yes | U8 allows control smartphone music player |
| Call Control | No | Yes | U8 allows you control phone calls |
| Camera Control | No | Yes | U8 has a smartphone's remote control function |
| Find Phone | No | No | Both don't have a find phone feature |
Battery |
| Duration | 365 days | 6 days | Polar RS800CX battery life is about 60.8 times longer |
| Battery Type | Replaceable Cell Battery | Rechargeable Battery | |
Physical Specs |
| Weather Resistance | Yes | Yes | |
| Waterproof | No | No | |
| IP Rating | 5 ATM | n/a | |
| Weight | n/a | 44 grams | |
User Interface |
| Display | Yes | LCD Screen | |
| Display Size | 1,3 inches | 1,48 inches | |
| Screen Resolution |
n/a
|
128 x 128 pixels
| |
| Color Display | No | Yes | |
| Touch Screen | No | Yes | |
Compatibility |
| Android | No | Yes | U8 is compatibles with Android phones and tablets |
| iOS | No | Yes | U8 can connect with iPhones or iPads |
| OS X/Mac | Yes | No | Polar RS800CX compatibles with MacBooks and iMacs |
| Windows Phone | No | Yes | U8 compatibles with a range of Windows Phone devices |
| Windows | Yes | No | Polar RS800CX allows you to locate your phone |
| Web Portal | No | No | Both don't have online web portal option |
| Social Features | No | No | Both don't have social features |
Connectivity |
| Bluetooth | No | Yes | Only U8 has a built-in Bluetooth connection option |
| 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 | |
