Test your observation skills by finding the unique image among a set of similar ones. Race against the clock to complete each challenge and discover all the hidden differences.



247+ iOS apps & games curated and reviewed
Out of 247+ odd one out puzzle 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 | 4.7★ (11) | No | No | May 2026 | ||
| 2 | Free | 4.2★ (89) | No | Yes | Aug 2026 | ||
| 3 | Free | 3.1★ (43) | No | No | Aug 2026 | ||
| 4 | Free | 4.6★ (1.1K) | No | Yes | Sep 2026 | ||
| 5 | Free | — | Yes | No | May 2026 | ||
| 6 | Free | — | No | Yes | Sep 2026 | ||
| 7 | Free | 5.0★ (4) | Yes | Yes | May 2026 | ||
| 8 | Free | 4.8★ (42) | No | Yes | Aug 2026 |



Test your observation skills by finding the unique image among a set of similar ones. Race against the clock to complete each challenge and discover all the hidden differences.






Engage your brain with this free word puzzle game. Spot the odd letter or difference between images across hundreds of levels. It's an addictive and fun way to sharpen your logic and observation skills, playable offline.



Test your observation and problem-solving skills with this picture trivia game. Find the one photo that doesn't belong with the other three in a variety of challenging puzzles. It's a fun way to exercise your brain and improve focus for all ages.