Good
Wham you open the app, you will see a whole list of different tenses. If you click in a certain category, for example present simple en present continuous tenses, you can create all kinds of assignments. It will then be checked immediately. I think it is a very good app for learning English. It is Free but you can also take special classes. That cost five euros. The app works well, looks clear and the assignments are also very good to practice with.