Engage in a challenging quiz game that appears simple but offers surprising difficulty. Test your intellect and see how many perplexing questions you can solve.





250+ iOS apps & games curated and reviewed
Out of 250+ gtd brain 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 | — | No | Yes | Oct 2026 | ||
| 2 | Free | 5.0★ (1) | Yes | No | Oct 2026 | ||
| 3 | Free | — | No | No | May 2026 | ||
| 4 | Free | 4.4★ (8) | No | Yes | Aug 2026 | ||
| 5 | Free | — | No | Yes | Oct 2026 | ||
| 6 | Free | 4.8★ (302) | No | Yes | Oct 2026 | ||
| 7 | Free | 4.6★ (12K) | Yes | No | Oct 2026 | ||
| 8 | Free | — | Yes | No | May 2026 |









Engage in a challenging quiz game that appears simple but offers surprising difficulty. Test your intellect and see how many perplexing questions you can solve.


