# i-Diatnonic

> i-Diatnonic (iPhone/iPad app by Senyo.)

- Source: https://appshunter.io/ios/app/i-diatnonic/id405843578 (this page in markdown: same URL + `.md`)
- Developer: [Senyo](https://appshunter.io/developer/385463609)
- Category: Music
- Price: Free
- Age rating: 4+
- Requires: iOS 6.0 · 1 MB
- Languages: English, Japanese
- Released: 2010-12-02
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/i-diatnonic/id405843578/reviews.md

## What is i?

i-Diatnonic is simple utility application to know the Diatonic code of specified key. 

■You tube
http://www.youtube.com/watch?v=HuSNU6FwSe0

For use:
・When you'ld like to change the key of score.
・When you don't know what code to play in the key.
・When your band's vocalist wish you to down the key.

You can change a key, and up / down half tone easily.
And of course, You can see the minor key's diatonic and 7th key's diatonic too.

Thanks.


## Version history (last 1 release)

### 2.0 — 2015-09-04

This app has been updated by Apple to display the Apple Watch app icon.

デザインを変更しました。

## More apps by Senyo

- [しごとのしふと](https://appshunter.io/ios/app/id385463606)
- [Shift of Work Free](https://appshunter.io/ios/app/shift-of-work-free/id398924466)
- [Transposition Calc](https://appshunter.io/ios/app/transposition-calc/id405843769)
- [Two-Steps](https://appshunter.io/ios/app/two-steps/id6751428715)
- [Oya-tube](https://appshunter.io/ios/app/oya-tube/id6751526637)

All apps by Senyo: https://appshunter.io/developer/385463609

---

*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 2026-05-19.*