A free app for Android, by Dhwani developer.

Custom AOD (Add images on Always On Display) is a useful app that allows you to add images, text, and stickers to your Samsung or Google Pixel always-on display (AOD). It is a free, open-source, and fully customizable app. 

It supports many different devices, including Samsung, Google, and many more. It also supports custom AOD displays on the Google Pixel, Samsung S7, and Samsung S7 Edge.

You can also use it to make your own custom AOD display. You can add your own images, text, and stickers to the AOD screen. It is very easy to use, and you will get a lot of options and customization.