Smart Watch Compatible with iPhone/Android Phones - This smart watch is compatible with most iOS 8.0 & Android 4.4 or higher smart phones (Not for PC or tablet). Pairing it to your phone, you can answer/make calls and read messages/app notifications(including Facebook, Instagram, Twitter, Whatsapp, and more) directly on this smartwatch. Accurate Fitness Tracker with 100+ Sport Modes - This fitness tracker watch can accurately track your all day calories burned, steps taken, distance traveled. 100+ sports modes including various outdoor and indoor activities, allow you to get the real-time workout data on the watch. Heart Rate/Blood Oxygen Monitor & Sleep Tracker - This health tracker watch will auto monitor your heart rate and sleep quality all day. You can also use it to monitor your real-time blood oxygen saturation.