Federica C.
Great for language teachers!
As a language teacher, I use this app with my students and it is excellent. It allows me and them to prepare ad customize sets of flashcards with lexical items and grammar rules for them to practice between lessons. The spaced repetition system helps them revise the items they find hardest more often. It is great for a quick daily review. You can use pre-made decks or you can make your own and recycle them with all the students who need them. The whole process is super intuitive. At the moment I'm writing they offer the usual monthly or yearly subscription for the "pro" version, but also the very convenient semester or lifetime sunscriptions. It may seem a bit costly if you use it rarely, but if you use it extensively as I do it is absolutely worth the price.