# Binary Hands: Count in Binary

> Binary Hands: Count in Binary (iPhone/iPad app by Yoshihide Maehama.)

- Source: https://appshunter.io/ios/app/binary-hands-count-in-binary/id6801839175 (this page in markdown: same URL + `.md`)
- Developer: [Yoshihide Maehama](https://appshunter.io/developer/6801839177)
- Category: Education
- Price: $0.99
- Age rating: 4+
- Requires: iOS 15.1 · 23 MB
- Languages: English
- Released: 2026-08-17
- Data updated: 2026-09-14
- User reviews in markdown: https://appshunter.io/ios/app/binary-hands-count-in-binary/id6801839175/reviews.md

## What is Binary Hands?

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.


## Version history (last 1 release)

### 1.0.0 — 2026-08-17

No release notes.

## More apps by Yoshihide Maehama

- [時計を学ぼう](https://appshunter.io/ios/app/id6802304229)
- [Unit Conveyor](https://appshunter.io/ios/app/unit-conveyor/id6805896024)

All apps by Yoshihide Maehama: https://appshunter.io/developer/6801839177

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-14.*