Use an with customizable size, position, and color settings. Perform calculations up to 15 digits. Challenge addition, subtraction, multiplication, and division problems. Adjust bead sounds and screen orientation for horizontal use.
by Hirokazu Komatsu★ 4.560 ratingsEducationFreeData updated 2026-09-28
Train concentration, reaction, and calculation power.
The app trains concentration, reaction, and calculation power through number puzzles. Players compete against time to fill grids using addition, subtraction, or multiplication modes.
Perform arithmetic operations on large decimal numbers with up to 66000 digits. Add, subtract, multiply, and divide using a single format. Choose between Swift or Objective-C calculation engines.
