What is Max Abacus? It is application for calculating numbers by Abacus. Main Function 1. Support Double touch : single and Double touchable. 2. Easy reset : Just shake device for reset. Instruction 1. Each of upper side bead means 5. 2. Each of lower side bead means 1. 3. Summation of upper and lower beads is the value of a each column and it is indicated just top of the column.