The Smartphone App Controlled Alarm Clock syncs with your smartphone or tablet to make sure you wake up on time. And, setting it up is easy as 1-2-3. Simply download the free app and use your device to program up to 5 alarms. Features dimmable backlight, customizable snooze controls, countdown timer and auto time sync. Compatible with all iPhone/iPad (iOS 7.1+) and Samsung Galaxy/Android (OS 4.3+).