Battery Percentage is a free Android app developed by edavid93 in the Utilities & Tools category. With this app, users can easily change the setting to show the battery percentage on their Android devices running KitKat, Lollipop, Marshmallow, Nougat, Oreo, and Pie.

The app works without root and does not require a reboot for Marshmallow and Nougat devices. The percentage text is always visible on Lollipop devices, and the text color changes depending on the level of the charge of the battery. On Oreo and Pie devices, the percentage is shown next to the battery, and the setting will be kept even after the app is uninstalled. However, it is important to note that this app may not work if the system UI on the user's phone has been modified by the manufacturer or if a custom ROM with built-in battery icon modification is being used. Before uninstalling the app, users must turn off the setting in the app to avoid hiding the battery percentage on the icon.

Overall, Battery Percentage is a useful app for Android users who want to keep track of their device's battery percentage with ease.