Problems in a very interesting app

I like this app! It has an interesting approach to animating the meaning of verbs, which is neat. It has a good voice for pronunciation. The problems -- and they are huge -- are 1) no passive voice, 2) the app freezes after every verb animation on my ipad 4, and I have to restart the program. Extremely clunky.

Levo Dextro about Learn German Verbs - LearnBots