The special feature of the app is the simultaneous display of the task on the abacus. The red and blue dots illustrate the task. A child will first count the points. The points are built in 10 and 5 blocks. This promotes understanding of the decimal system.
The abacus appears after a short time or can be shown by just tap it.

A series of tasks is made up of 10 individual tasks. The progress is shown in the form of the asterisks.