Kinda sucks

Every single time I get stuck on one I try this app, but it always says "could not detect letters" so I can never get it. I try and try again but its always the same. With every single one. I even try closing the app. Nothing. If this is a bug please fix it.

Londen2002 about Cheats for "4 Pics 1 Word" - All Answers Free, v1.8