ELEGIANT GV18 Smart Bluetooth 3.0 NFC Watch Phone Camera TF Card Wristwatch for Smartphones IOS (Partial functions) iphone 5/5S/6 Android (Full functions) Samsung S3/S4/S5/S6/S6 Edge Note 2/3/4/edge HTC M8/M9 Sony (Black) The APP of scaning QR code is Chinese version. Be careful when removing back cover to install battery. Do not use force to put the battery in. The date of Pedometer function and sleep detection are not very accurate, if you pay special attention to these healths date, please do not buy IOS system just support music player and call function,iPhone user need to take it seriously before you buy it. Passometer, Sleep Tracker, Message Reminder, Call Reminder,Answer Call, Dial Call,Remote Control, Push Message