FLIP DND APP FEATURES
Flip DND will automatically start up every time you reboot your phone and the service will always be running unless you hit the “Stop” button in the app’s main menu or on the notification. 
By default, the app has its “Vibrate” setting turned on. With this setting on, when you place your phone on a surface face down, it will vibrate twice to signify that it is now in do not disturb mode.
When you flip or pick up your phone, it will vibrate once to signify it is no longer in DND

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