- Tap the screen to start the timer when the app has been launched. - Tap the screen to reset the duration while the timer is running. - Swipe up the screen to pause the timer and to reveal a picker view for duration. - Change the current duration in the picker view. - Tap the screen to close the picker view and resume the timer with the new duration. - You can play songs in your music library in random order with the music player controller. - Press the screen for more than 1 seconds to hide the music player controller. - Press the screen for more than 1 seconds to show the music player controller.