Binary Hands: Count in Binary
iOS app by Yoshihide Maehama. Education · Yoshihide Maehama
- Store rating
- 0 / 5
- Store rating count
- 0
- Download price
- 0.99 USD
- In-app purchases
- Unknown
- Version
- 1.0.0
- Listing last refreshed
- 2026-09-09
View the original store listing
Store description excerpt
Fold your ten fingers and binary numbers become something you can see. Your left thumb is 512. Your right thumb is 1. Each finger is one bit, so the weights of the folded fingers add up to any number from 0 to 1023. The 10-digit binary readout and the decimal value move together, which is why 1000011 stops being something to memorize and starts being a shape your hands can make. WHAT YOU CAN DO - Tap a finger to fold or extend it. The total updates instantly - 10-bit binary readout. Bits that turn to 1 light up in yellow - Every bit weight is always on screen (512, 256, 128 ... 2, 1) - The value is read aloud in English or Japanese - Switch between "folded = 1" and "extended = 1" to suit how you teach - Switch between English and Japanese - Reset button returns everything to zero WHO IT IS FOR - Students meeting binary for the first time - Anyone who got stuck on base conversion while studying for an IT exam - Teachers and parents explaining binary to someone else - Beginning programmers who cannot quite picture bitwise operations NO ADS, NO PURCHASES This is a one-time purchase. There are no ads and no in-app purchases. The app never connects to the internet, so it works in airplane mode.
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