# Keyboard² — Playable Keyboard for Keyboard

> Custom keyboard for playing musical notes, chords, and symbols on iOS devices. (iPhone/iPad app by Takuto Nakamura.)

- Source: https://appshunter.io/ios/app/keyboard/id1337674728 (this page in markdown: same URL + `.md`)
- Developer: [Takuto Nakamura](https://appshunter.io/developer/1203150472)
- Category: Utilities, Music
- Price: Free
- Rating: 4.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 11 MB
- Languages: Japanese, American English
- Released: 2018-01-22
- Data updated: 2026-08-21
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/keyboard/id1337674728/reviews.md

## What is Keyboard²?

Keyboard² is a custom keyboard that enables you to play the keyboard on your iPhone & iPad!

[Function]
- You can enter numbers and mathematical symbols.
- You can enter the musical scales of ABC music notation.
- You can play sound.
- You can play a chord.

[Attention]
- You have to do the additional procedure of Keyboard² to use it. (Preferences -> General -> Keyboard)
- Then, you also have to turn on the "Full Access" for Keyboard².
* Please don’t worry - we do not collect your data at all.

[Support]
- Please do not hesitate to contact us for any defect reports or questions/requests.
- We will consider any requests for additional functions.

## Key features

- Play musical notes and chords
- Enter numbers and mathematical symbols
- Supports ABC music notation
- Play sounds
- Custom keyboard functionality

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/keyboard/id1337674728/reviews.md

### 5/5 — 神アプリ

*2026-02-24*

メロディのメモに最適
文字で音階打つより早いし音鳴らして確かめられるし

### 5/5 — How

*2024-06-14*

How you connect to keyboard Irl?

## Frequently asked questions about Keyboard²

### How do I set up Keyboard²?

To use Keyboard², you need to perform an additional setup. Go to your device's Settings, then General, then Keyboard. After that, you must enable "Full Access" for Keyboard².

### Does Keyboard² collect my data?

No, the developers state that they do not collect your data at all, even when 'Full Access' is enabled for Keyboard².

### What devices does Keyboard² support?

Keyboard² is compatible with iPhone, iPad, and iPod devices.

### What is the age rating for Keyboard²?

Keyboard² has an age rating of 4+, making it suitable for a wide range of users.

### When was Keyboard² last updated?

The latest version of Keyboard² was released on September 14, 2020, with the current version being 1.2.

### Can I contact the developer for requests?

Yes, you can contact the developer, Takuto Nakamura, for any defect reports, questions, or requests for additional functions.

### Does Keyboard² have ads?

No, Keyboard² does not contain advertisements.

## Version history (last 4 releases)

### 1.2 — 2020-09-14

Modifications
- Overall maintenance has been performed in line with recent OS updates.
- The user interface has been updated.

### 1.1.0 — 2019-01-12

- Fixed a bug that the sound of the piano will not stop.
- Fixed layout bug.

### 1.0.4 — 2018-01-26

-Fixed a bug that sounds would not play.

### 1.0.0 — 2018-01-22

No release notes.

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## More apps by Takuto Nakamura

- [MorseConverter](https://appshunter.io/ios/app/morseconverter/id1323511370)
- [Forethumb](https://appshunter.io/ios/app/forethumb/id1325147667)
- [Forethumb いろは](https://appshunter.io/ios/app/forethumb/id1351876497)
- [MojiPhoto](https://appshunter.io/ios/app/mojiphoto/id1443208901)
- [Telescopure](https://appshunter.io/ios/app/telescopure/id1643406104)

All apps by Takuto Nakamura: https://appshunter.io/developer/1203150472

## Related topics

[music notation keyboard](https://appshunter.io/ios/topics/music-notation-keyboard) · [instrument keyboard](https://appshunter.io/ios/topics/instrument-keyboard) · [2cboard keyboard](https://appshunter.io/ios/topics/2cboard-keyboard)

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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 2026-08-21.*