Develop perfect and relative pitch with this ear training app focused on just intonation. Learn to identify and match harmonic intervals by ear, moving beyond equal temperament. Ideal for musicians and singers seeking precise intonation.






47+ iOS apps & games curated and reviewed
Out of 47+ toshihiko arai apps and games on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 4.4★ (414) | Yes | Yes | Sep 2026 | ||
| 2 | Free | 4.5★ (20) | Yes | Yes | Oct 2026 | ||
| 3 | Free | 4.8★ (4) | No | No | Aug 2026 | ||
| 4 | Free | 5.0★ (1) | Yes | Yes | Sep 2026 | ||
| 5 | Free | 4.0★ (7) | Yes | Yes | Sep 2026 | ||
| 6 | Free | — | No | No | Sep 2026 | ||
| 7 | Free | 3.3★ (54) | No | Yes | Sep 2026 | ||
| 8 | Free | 4.9★ (11) | Yes | Yes | Sep 2026 |






Develop perfect and relative pitch with this ear training app focused on just intonation. Learn to identify and match harmonic intervals by ear, moving beyond equal temperament. Ideal for musicians and singers seeking precise intonation.






Practice your Japanese flick input and typing speed with this game. Master character input, compete in global rankings, and even use it for English, Chinese, and Korean language learning. Aim for level 30 and share your progress.




Enhance your live streaming experience with a comprehensive comment viewer. Customize comment colors, enable text-to-speech, and automatically fetch comments from upcoming broadcasts. Post comments directly and integrate with TV commentary.