246+ iOS apps & games curated and reviewed
The best number system apps and games on iPhone average 2.9★ across 246+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (10) | No | Yes | Sep 2026 | |
| 2 |  | Free | — | No | No | Jun 2026 | |
| 3 |  | Free | 1.0★ (1) | No | No | Aug 2026 | |
| 4 |  | Free | 3.0★ (1) | Yes | Yes | Sep 2026 | |
| 5 |  | Free | 3.7★ (6) | No | Yes | Oct 2026 | |
| 6 |  | Free | — | Yes | No | Aug 2026 | |
| 7 |  | Free | 4.6★ (1.2K) | No | No | Oct 2026 | |
| 8 |  | Free | — | No | No | May 2026 |
Learn and master the Nashville Number System for music. This app offers interactive modules to help musicians of all levels understand chord progressions, transpose songs, and improve their ear training. It's designed for quick learning and on-the-fly musical communication.
Easily convert numbers between decimal, binary, hexadecimal, and octal systems. Supports conversion to and from any base.
