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.



231+ iOS apps & games curated and reviewed
Out of 231+ 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 | 4.6★ (1.1K) | No | Yes | Jul 2026 | |
| 3 | Free | 4.1★ (84) | No | Yes | Jul 2026 | |
| 4 | Free | 3.1★ (43) | No | No | May 2026 | |
| 5 | Free | 4.7★ (5K) | Yes | No | Jul 2026 | |
| 6 | Free | 4.4★ (1.3K) | Yes | Yes | Jul 2026 | |
| 7 | Free | 4.6★ (19K) | Yes | Yes | Jul 2026 | |
| 8 | Free | 4.8★ (17K) | Yes | Yes | Jul 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.



Test your observation skills by finding the unique icon among a collection of similar images. This game offers a vast library of icons to challenge your perception. Enjoy an ad-free experience as you play.






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.


Engage your mind with a creative and surprising brain-teasing game. Spot illogical elements and hidden oddities in imaginative scenes. Discover funny references and challenge your observation skills across diverse difficulty levels.


Place wooden blocks on a 9x9 grid to clear rows, columns, or 3x3 squares. This relaxing brain game offers a unique twist on classic puzzles, challenging your logic and spatial strategy without time limits. Master combos for bonus points and enjoy offline play.


A minimalist puzzle game where players remove arrows in the correct order and angle to clear a grid. Deep strategy is hidden behind simple rules, offering a challenging yet relaxing brain teaser with thousands of handcrafted levels and a daily challenge.


Engage your mind with a clever puzzle game where you strategically move colored blocks to fill pipes. Solve increasingly difficult levels by ensuring all blocks are filled with water to progress.


This game offers a relaxing, no-timer puzzle experience focused on color-matching and logic. Players move colored holes to match and drop marbles, solving hundreds of handcrafted levels at their own pace without any pay-to-win mechanics.


A minimalist puzzle game where you tap arrows in the correct sequence to clear a grid. It offers a zen-like experience with challenging logic puzzles and a sleek interface, playable offline.


This classic math puzzle game challenges you to arrange numbered blocks in order by sliding them into an empty space. It tests your logic and reaction speed with multiple difficulty levels and board sizes. Enjoy this brain-training game offline, anytime, anywhere.


Engage in a humorous and imaginative puzzle-solving adventure with unconventional logic and unexpected twists. This sequel offers a richer experience with quirky plot lines and interactive elements, requiring creative thinking and wit to overcome bizarre challenges. Enjoy simple controls and unlimited hints to spark new ideas.


Merge colorful numbered hexagons to reach the ultimate goal of seven. Strategically combine three of the same numbers to increase their value, and watch out for powerful bombs when sevens merge. Enjoy this addictive puzzle game with no time limits and offline play.


Challenge your observation skills by finding the unique item among a set of similar objects. With numerous themes and levels, the game offers a fresh experience each time. Compete with others on leaderboards or play at your own pace.


A minimalist logic puzzle game where players place cats on a grid, ensuring each row, column, and region has one cat, and no two cats are adjacent. It offers a calming, deduction-based experience with no timers or pressure, playable offline.


Control a ravenous black hole that must consume all food items in a level. Progress by eating smaller items first to grow larger and tackle bigger challenges. This addictive arcade puzzle game offers mind-bending logic challenges.


Engage your mind with a relaxing number block puzzle game. Drag and tap blocks to arrange them in order, offering a simple yet challenging experience for all ages. Enjoy beautiful backgrounds and various block materials.


Engage in a fun puzzle adventure by matching and connecting identical images. This memory game offers numerous brain teasers and is playable offline, providing hours of addictive pair-matching entertainment. Utilize boosters like HINT and SHUFFLE to aid your progress.


Engage in a mind-bending puzzle game where you must think creatively to solve everyday challenges. Overcome unexpected problems with clever solutions and train your brain while enjoying a story-driven experience.

