Using the app

On the main screen of the app, select whether you want to work with the four-slot field, the ten-slot field, or the twenty-slot field. Tap on the dark colored ring to place a cherry. 
In each field you will find three buttons: a drop of color, a raven, and a cross. If the cross is touched, all cherries are removed from the field at once. The color drop indicates whether the next cherry placed in a ring is red or yellow. If red and yellow cherries are combined, the corresponding addition is displayed at the bottom of the screen.
Tap on the raven, it flies over the field and eats a cherry. The corresponding subtraction is displayed in the lower part of the screen.

General settings

There are general settings which are made at the first start of the app:

  • language: English or German
  • animations: on or off
  • high-contrast display: on or off
  • display of numbers 1, 7 and 9

You can change these settings at any time. Tap the gear wheel to change settings.

Show and hide elements
While working with the app, it is often necessary to hide unneeded elements. For example, it is recommended to hide the color change button (drop) and the minus button (raven) when practicing counting.
Tap the three lines in the upper right corner of the quad, tens or twenties field. A menu opens in which the various elements can be hidden. If you tap on the button with the house, you will return to the main screen.