Mio slice is the first wearable that provides a pai score the most meaningful way to track all your activity motivating you to stay healthy compatibility requires the mio pai application for configuration free download in the app store and google play store ios 90 and above iphone 7 7plus 6s 6s plus 6 6 plus se and 5s android 50 and above google nexus 5 5x 6 6p samsung galaxy s5 s6 s7 note 5 specifications tracks pai heart rate resting heart rate sleep