It is a unique app in the AppStore that makes it fun for your child to learn to count and calculate. The successful Montessori method was the basis for designing our computational framework. Teachers, parents, and children have participated in the development of the app. Together with the possibilities of modern technology, this app is has become a success. The aesthetically pleasing design of the abacus can communicate in ​​German, English, Spanish, Dutch, and French. The voices are native speakers with experience in this area. With the different levels of difficulty, your child can begin to use this computational framework as early as preschool. Bills up 10, 20, 100, 1000 or 99,999 plus or minus are selectable. The abacus has four rows of ten beads: The blue row represents the ONES The red row represents the TENS The green row represents the HUNDREDS The yellow row represents the THOUSANDS There are four abacus variants: Abacus 1: An abacus for free arithmetic. Here, your child can move the beads and use the rows as he or she likes. Abacus 2: An abacus for calculation with free display that shows the numbers of displaced beads. Sorted by colors, the numbers are accurately represented in tens, hundreds, and thousands. This way, your child learns the THZE system. Abacus 3: An abacus with addition tasks. by correctly moving the real pearls, you can solve the tasks. Here your child will have fun completing the tasks. With the pearls, completing the tasks becomes a game. Abacus 4: An abacus with subtraction tasks. By correctly moving the real pearls, you can solve the tasks. Here your child will have fun completing the tasks. With the pearls, completing the tasks becomes a game. Setting options: - Language (English, German , Spanish , Dutch, French) - Voice on or off - Sound on or off - Difficulty : Level 1: Calculations up to 10 Level 2: Calculations up to 20 Level 3: Calculations from 20-100 Level 4: Calculations from 100-1000 Level 5: Calculations from 1000-99999 Level 6: Calculations from 1-99999 - Statistics ( Here all results are recorded )