Front&Back Flash Notifications is a special app that lets you know when your device receives notifications. It works with most Android devices that use Samsung Smartphones or J7, J5, J2, Moto Z, and other devices with a camera flash on the front and/or back. It works with the Android operating system. 

It is a free app that is developed by a group of developers from all over the world. It is an open-source project, which means that it is not only free but also open source. The source code of the app is made available for anyone to download and modify. You can even make your own app and release it as open-source.