A free program for Android, by kix2902.

There is no denying that notifications showing up on your phone while doing something else is kind of annoying. When you are playing on your device, it coincidentally appears and gets tapped at the most crucial parts of the game. So, to make it easier for you in general, we introduce you to Notification Blocker.

Notification Blocker is a free, open-source tool for blocking notifications. With this app, you will be able to pick which apps on your device can notify you. Aside from this, this tool will also let you enable and disable the locking system anytime you want.