Finnish vocabulary trainer for German speakers
offers a vocabulary trainer Finnish to German and vice versa with the 215 common words (it's great to see how many of those we've already covered in the DL course!).
It's multiple choice, so one can "cheat" a bit by excluding most of the other options. It's basically endless and you can spend as much time as you want. The feedback section tells you the percentage of correct answers, the average time spent on each answer, the average number of attempts before you got it right, how many times you got it correct at the first attempt, and the times all your guessing didn't help.
It provides a link to problematic words and to the words you got right every time. I wouldn't call that the mastered words since it's much easer to recognize words, but it's still quite valuable feedback.
I don't know if there is any spaced repetition applied; it doesn't look like it. But it's definitely a fun and addictive way to expand your vocabulary.