The Fabulo apps are a very useful group of language apps for mobiles. I find them really useful, but the only limit is that the tests are really too easy with typing test limited to one missing word. So I've decided to copy words and sentences in Memrise to study them with my preferred learning method. The project is to grow many languages at the same time level by level so the levels will published gradually. If you need to advance in a specific language, please write in the forum.