[EDIT: I have tested the app in several different brands and makes of smartphones, such as Samsung, Google, and HTC. However, some devices, such as Asian smartphone makers Xiaomi, Vivo and Oppo still provide obstacles in truly implementing the app with the ringer management. Several OnePlus devices reported that the app was not working the way it should have. Please note that due to the hardware switch implementation of the phone for its ringer modes, it is highly difficult to integrate the software to work seamlessly with this feature.The problems will be solved for these and several other devices with subsequent patches. I hope that for those whose phones are supported, the app worked well]

Ringer Timer helps you manage your phone's ringer profiles, by setting a timer for changing ringer modes, letting you forget about your phone's current ringer mode.

You might know for how long you want your phone to be 'Silent' or 'Vibrate', such as a movie you might watch, a class you might attend or maybe just a small nap. Ringer Timer gives you the freedom to change your current ringer mode without the worry of reverting it back to normal.

Once you download the app, there is no need to open it. Ringer Timer works by implementing the Ringer Mode Switch in the Drop Down Notification Bar in several android phones, or the Do Not Disturb Switch in Stock Android Phones. Whenever you click on the Change Ringer Mode toggle or the Do Not Disturb toggle, a small dialog box will appear, prompting you to set a timer for changing the ringer mode, select the required mode and you're done.

Now just sit back, and catch that movie without the worry of forgetting to set your ringer to normal.