App Brightness Manager Free is an Android app developed by Athiban Raj, which helps manage the brightness of your device on a per-app basis. It is a free app that allows users to set different brightness levels for each application installed on their device. With this app, users can achieve a comfortable viewing experience while also saving battery life.

The app comes with preset brightness settings that can be configured on a per-app basis. It automatically adjusts the brightness level when you open a configured app and restores the device's default brightness level when you exit the app. The app has a clean and intuitive UI that makes it easy to use.

It's worth noting that some manufacturers handle device brightness differently than the default method, so if you feel your device isn't achieving 100% brightness even when you set it to 100%, you can calibrate your device's 100% brightness in the settings to fix it. Additionally, users can remove ads by upgrading to the Pro version.

The app requires permission to modify system settings and usage access to check the currently open app for applying brightness settings. Overall, App Brightness Manager Free is a useful app for users who want to manage their device's brightness levels on a per-app basis.