248+ iOS apps & games curated and reviewed
The best even or odd mental calculation apps and games on iPhone average 4.5★ across 248+ titles — we've ranked them by what real users actually keep on their phones. Updated November 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | Yes | Sep 2026 | |
| 2 |  | Free | — | — | No | Aug 2026 | |
| 3 |  | Free | — | Yes | Yes | Nov 2026 | |
| 4 |  | Free | 4.7★ (1.2K) | No | Yes | Nov 2026 | |
| 5 |  | Free | 4.0★ (1) | No | Yes | Nov 2026 | |
| 6 |  | Free | 4.7★ (14) | Yes | No | Oct 2026 | |
| 7 |  | Free | — | No | No | Oct 2026 | |
| 8 |  | Free | 4.7★ (2.2K) | Yes | Yes | Nov 2026 |
Test your mental math skills by quickly determining if the result of an on-screen operation is even or odd. Earn more points for faster answers and challenge friends to see who has the quickest mind. The difficulty increases as you progress.
Learn fascinating mathematical tricks to perform calculations faster than traditional methods. This app helps users master basic arithmetic and impress others with their quick math skills in everyday situations.
