After I finish a lesson, it would be nice to be able to tap each phrase to hear it repeated again and maybe provide a little more info on it, such as which word means what.
It would also be nice to have a big review page that has everything I have learned so far similar to the look of this page. If I want to review things I have learned I just have to take more review lessons which are random, sometimes I just want to easily access a phrase I already learned.