Pros:
+good quality audio and content
+many different exercises to practice
+audio recognition exercises
+daily rank is very motivating

Cons:
-pricing is high due to exchange rate (PLN/USD)
-Mobile app UI (android) is not well designed (too small icons; far away buttons; a lot empty space; hand becomes quickly tiered from jumping from record icon to easy/medium/hard button)
-a little too much English in recordings

Ideas:
-bigger buttons; small mobile app redesign
-access to recording transcript (more than just one sentence at a time)
-accumulation of all flashcards and other exercise into one big place to exercise what I already should know;