The description did not make much sense, so here is the quite from the author:

This is a very beta of an app I created. It’s basically a gif.
It breaks on parts, but it helps.
It helps you lucid dream by telling you words like “you’re dreaming”, “you’re going to have a lucid dream tonight” or “do a reality check!”. If successful, you may dream these words, or even your DS!
Until I learn how a gif loops…
You’ll have to restart it by self.