A free program for Android, by C.P.S..
Scroller – LED Text – With v is a free and easy-to-use app that allows you to use your smartphone or tablet as a creative outlet and express yourself in a new and unique way.
It displays a scrolling text on the screen. You can use it in different ways. It is a good idea to use it in a quiet place, so you can hear the text better.
There are some buttons that you can personalize with the text you want. It is very easy to use, and it does not take much memory.
It is useful for people with speech disorders. It also works well in noisy environments, such as bars, pubs, discos, demonstrations, concerts, parties, etc.