Best free Czech app I found

Slick app, well designed, good voice-overs of words, more than just random vocab unlike memrise- can select what types of words and how often you want to review them. Very customizable. Only complaints- I wish there was more variety and combining of language (like in duolingo) such as images, typing translations, speech correction, etc. Also, the free version is such basic language, you must pay $10 to unlock most of the content. I havent done this yet, so cant comment except it looks like Im missing a lot.

Caralumi about Czech by Nemo