Why can I use this all the time – Font Infinity ∞ Cool New Fonts Changer and Better Text Styles on Pictures & Photos Review

I love this app but I want to use it with out typing it on that in the app then sharing it I have iPhone 6 but it still ant doing any better if anyone can let me know if it's in the full one like that
Review by Cam the pro sniper on Font Infinity ∞ Cool New Fonts Changer and Better Text Styles on Pictures & Photos.