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
Teach and practice with customizable settings. Solve random or custom problems with adjustable number lengths. Set colors and interface preferences. Track progress with interactive exercises.
The app performs direct addition or subtraction of decibel (dB) levels. It converts sound levels to a linear scale using an antilog function for calculations.
