Irish Grammar App Reviews

Is maith liom an app seo, but when I try to place a fada over a vowel, the app crashes. Perhaps Im doing something wrong. I use a bluetooth keyboard with my iPad. The way I insert a fada is to go "option+e" then the vowel. How would the fadas work with the iphone and standard USA iPad keyboard? Ive tried "á" as well to place a fada above an "a", but then the program marks the answer wrong.

This app is brilliant, would highly recommend it for anyone learning the Irish language. It is extremely helpful and easy to follow. Dennis, if you keep your finger on the vowel, various options appear, including the fada, this works for me!