Learning a language hands-free
Some of the best study time is time you were never going to spend at a desk: a commute, a walk, the hour before sleep. Tongues turns your decks into generated audio playlists that play from your lock screen, so you can learn while your hands and eyes are busy elsewhere.
Hear the word in your native tongue, then your target language — or the other way around — and heart the ones worth revisiting. It is comprehensible input that fits into the gaps of an ordinary day.