April 2020
1. Exercises with various degrees of difficulty: ascending, descending, random and simultaneous intervals
2. Selection of intervals for your exercise: all, weakest and custom
3. Learning progress indicator for the overview of your abilities, displaying the average of the last and all-time exercises
4. Get reminded of your daily exercise in order to get a steep learning-curve
German, English, French, Brazilian Portuguese, Korean, Spanish as well as traditional and simplified Chinese