# はじめてのアドリブ — コード進行でアドリブ練

> コード進行でアドリブ練 (iPhone/iPad app by Hironori Karube.)

- Source: https://appshunter.io/ios/app/id6762198096 (this page in markdown: same URL + `.md`)
- Developer: [Hironori Karube](https://appshunter.io/developer/1880243912)
- Category: Music, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 31 MB
- Languages: American English, Japanese
- Released: 2026-04-15
- Data updated: 2026-06-16
- User reviews in markdown: https://appshunter.io/ios/app/id6762198096/reviews.md

## What is はじめてのアドリブ?

"My First Improv" is a music app for practicing improvisation over chord
  progressions.                                                                       
   
  【Features】                                                                        
  ・Scales displayed automatically for each chord
  ・View scales on guitar fretboard or piano keyboard
  ・Rich rhythm patterns: Jazz, Bossa Nova, Rock, Samba and more
  ・Freely arrange chord progressions
  ・Tempo control and count-in function                                               
  ・Great tool for composition and arrangement
                                                                                      
  【Premium】     
  ・All rhythm patterns unlocked
  ・Up to 16 bars of chord progressions

  Perfect for beginners and experienced players alike.

  For detailed instructions, please visit our support page.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium | $0.99 | one-time |



## Version history (last 5 releases)

### 1.7 — 2026-04-29

Song order in the list can now be rearranged.

### 1.6 — 2026-04-22

・The 7th note of the chord is now highlighted in green                       
    even when the chord does not explicitly include a 7th.                    
    (e.g., When Key=D and chord is A, G will be shown in green)                 
                                                                                
  ・Added a pencil icon next to each song name in the Library.                  
    Tap it to rename the song directly without reloading it.                    
    (This also resolves the issue of duplicate song entries)

### 1.5 — 2026-04-22

Fixed incorrect fretboard positions when using Minor Scale,
  Minor Pentatonic, or Blues. (e.g., Key=C now correctly shows                  
  Am positions instead of Cm)
  The key display now shows both relative keys (e.g., "C・Am"),                 
  highlighting the active one based on your scale selection.

### 1.4 — 2026-04-20

Improved chord display in the staff view.
  Updated scale color coding: the 7th degree is now highlighted in green.
  Made the scale selection button text larger.

### 1.3 — 2026-04-17

Prevented the screen from sleeping during playback. Also adjusted the UI display of 
  the guitar fretboard and piano keyboard.

## More apps by Hironori Karube

- [Tap Memo: Lightning Fast](https://appshunter.io/ios/app/tap-memo-lightning-fast/id6759693797)
- [Brush Up My Recipes](https://appshunter.io/ios/app/brush-up-my-recipes/id6762356864)

All apps by Hironori Karube: https://appshunter.io/developer/1880243912

---

*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 2026-06-16.*