iOS
Devices with iOS 8+ and Bluetooth 4.0 BLE:
iPhone 4S, 5, 5C, 5S, 5SE, 6, 6 Plus, 7, 7 Plus - iPad (3rd, 4th and 5th generations)
iPad Mini - iPod touch (5th generation)
Android
Select Android 4.3 devices with Bluetooth 4.0 BLE
Windows Phone
Select Windows Phone 8.1 devices with Bluetooth 4.0 BLE