tl;dr: best app to learn French?
I learnt French for 7 years at school, but forgot most of the grammar and a lot of vocabulary, because it's been 5 years since high school. Are there any apps that let me brush up on French? It should include beginner-level grammar, but shouldn't be so basic that i've never spoken the language before, so it shouldn't include "je m'appelle Anon, j'habite dans la rue daguerre"