UP3 by Jawbone Heart Rate, Activity + Sleep Tracker, Indigo Twist (Navy Blue) Heart health monitoring throughout the day Get personalized guidance from Smart Coach Advanced sleep tracking automatically to capture REM, Light and Deep Smart Alarm silently wakes you at the optimal time in your sleep cycle Syncs wirelessly plus 7 days battery life Android compatibility - UP2, UP3 and UP4 are compatible with Android 4.3 (Jelly Bean) or later. iOS compatibility - UP2, UP3 and UP4 are compatible with the following iOS devices:iPhone 4S or newer, iPod Touch 5th generation or newer, iPad 3 or newer, iPad Mini 1st generation or newer, iPad Air 1st generation or newer