Notch Battery Bar & Energy Ring, developed by Extinct Entertainments, is a personalization app designed for Android devices. This free app transforms your boring notch into a battery bar, adding a unique touch to your device's appearance. With support for many types of notches and punch hole cameras, this app allows for full control and endless customization. The colors can be changed for different battery levels, making it easier to monitor your device's battery life.

One of the best things about this app is that it does not consume too much battery, as it is only updated on battery percentage change. Additionally, the app comes with an included live wallpaper that features a battery border. However, for OnePlus users with Android 9+, there are some additional steps required to make the app work properly.

Overall, Notch Battery Bar & Energy Ring is a great app for those who want to add some personality to their device while also keeping an eye on their battery life.