Experience the classic 21-card trick directly on your mobile device. Simply remember your card, select its pile, and watch as the app reveals your chosen card through clever logic.
card piles by Richard Koopmann


248+ iOS apps & games curated and reviewed
Finding the right card piles apps and games can be overwhelming with so many options. We've analyzed 248+ apps and games to bring you the best choices for 2026, from free options to premium solutions with advanced features.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | $1.00 | 5.0★ (1) | No | No | Oct 2026 | ||
| 2 | Free | — | Yes | No | May 2026 | ||
| 3 | Free | 3.0★ (5) | No | No | Sep 2026 | ||
| 4 | Free | 4.7★ (13K) | Yes | Yes | Nov 2026 | ||
| 5 | Free | 4.8★ (63) | Yes | Yes | Oct 2026 | ||
| 6 | Free | — | Yes | No | May 2026 | ||
| 7 | Free | — | No | No | Oct 2026 | ||
| 8 | Free | — | No | No | Nov 2026 |


Experience the classic 21-card trick directly on your mobile device. Simply remember your card, select its pile, and watch as the app reveals your chosen card through clever logic.











Organize a messy pile of cards by matching them into categories. Drag category cards to slots, then find and match related cards to clear them. Generate new cards when needed to continue the word association puzzle.