This app is a very good tool for the practice of irregular verbs. It has a pretty basic look to it, but you don't want anything to flowery when you are out to just practice verb forms. Enter your answers into the text field, press GO and you will find out if your answer is correct. If the answer is wrong, the correct answer is given we like that.
Requires iOS 3.1.3 or later. Compatible with iPhone, iPad, and iPod touch.