Sadly for Android users, the app is iOS-only, because it’s made specifically for the iPhone’s Live photos — the 1.5 seconds of video that the phone (and iPad) captures before and after a still photo is taken.
In the app, it only supports photos taken with the Live function toggled on, so you won’t be able to do the text effect on videos, for instance.
Google says the app is able to identify and track individual objects in a video, so it can automatically “stick” the block of text to the nearest moving object that you place it to.
The Motion Stills app, first released in June, is primarily aimed at stabilizing your shaky Live photos.
Here it is doing a great job of tracking moving text without stabilizing
And here it is with stabilizing on:
Now go make some great GIFs.