A free program for Android, by Luko Parallel App Pvt Ltd.

This app (Always On Display AMOLED) is designed for people who want to show information like time, date, notifications, and other information on the screen of their mobile phone without having to touch it. If you want to show the time or date on your screen, this app is the best way to do it.

You can also choose from several different styles of time and date, including digital and analog.

It is also possible to change the color of the text and the font size.