Loved this app before (I've been a user since 2016). It was a fantastic resource for learning German and I "binged" many other languages as well. The introduction of the hearts system feels like a senseless money grab. This should be a 5 star review but this app has become nearly unusable. I have tried premium but I cannot justify it anymore and I am sad to be so limited. Update: also has issues with Fold3 where closing the screen makes you lose all progress on your current lesson.