GIF? Cannot Figure It Out – Legend for Messenger - Send Text in Animated GIF Review

I put text on a GIF file and sent it to the camera role. The program says, "It won't play in iPhone's photos app, but it's there." So I opened it in a app that I know DOES play GIF files and... Nothing! It was text on a picture without animation of the original GIF file. I cannot figure it out so I don't want to buy the full app since this version didn't work as advertised.
Review by Lawyer SCE on Legend for Messenger - Send Text in Animated GIF.