Works okay, very helpful context, but the part where you speak the words and they judge your pronunciation is super super broken for me, rendering the whole app half-useless. It either can not hear what I'm saying at all, or is way way off base about what I said. I've tried switching devices, switching to an external mic, etc etc but the problem seems to be ROCKETBOOK. So far Duolingo has proven to be better, and much more affordable. I hope they fix the voice part...