A free app for Android, by Przemek Wagner.
This is a simple widget app that lets you change the screen brightness. It's easy to use, just tap and hold to change the brightness and tap again to set the level.
There are two versions of this widget: horizontal and vertical.
This application is very useful and simple to use. You don't need to install any other application. You just need to install this one and that's all. You can set the level of brightness and you can use it to help you sleep or to wake up.
It's an amazing and simple widget. You can also set notification alerts so you'll know when the level of brightness is changed.
This application has ads on the configuration screen.