If I could give 0 stars,I would give it.But I can't so I'm giving 1 star.I thought it would be a useful app.But when I started using it,even though the picture is clear,it says that not detected or picture is not clear. And even if it gives answer,it's totally wrong answer.Ill delete it right now and won't reinstall unless they fix the problems.I recommend everyone not to use this app.