# Clue Formula — 3D Mahjong with IQ-test tiles > 3D Mahjong puzzle game with IQ-test tiles and pattern-matching challenges. (iPhone/iPad app by x2line.com LLC.) - Source: https://appshunter.io/ios/app/clue-formula/id1616776014 (this page in markdown: same URL + `.md`) - Developer: [x2line.com LLC](https://appshunter.io/developer/425135293) - Category: Games, Education, Casual, Puzzle - Price: Free with in-app purchases - Rating: 5.00/5 from 4 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 22 MB - Languages: American English, French (France), German (Germany), Italian, European Portuguese, Russian, Chinese (Simplified, China), European Spanish - Released: 2026-06-29 - Data updated: 2026-09-01 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/clue-formula/id1616776014/reviews.md ## What is Clue Formula? Clue Formula is a 3D Mahjong puzzle with IQ-test style tiles and pattern-matching challenges. Your goal is to complete all levels. In each level, remove all tiles by selecting matching pairs. Not every matching tile can be selected. A tile is selectable only when it is positioned at the end of a row - when there is no neighboring tile on at least one side (left or right) within the same layer. To complete a level, you need to find matching pairs where both tiles are selectable. Each new level becomes more challenging as you advance. A hint can show all selectable matching pairs. A shuffle can rearrange the remaining tiles and help you continue the level. Key Features: 3D Mahjong Puzzle: Match selectable pairs and clear each level. IQ-Test Style Tiles: Match tiles using shapes and symbols. Layered 3D Levels: Look through rows and layers to find selectable matching pairs. Leaderboards: Complete levels and compete for a place on the leaderboards. Accessibility and Device Support: Clue Formula is fully playable with VoiceOver. Clue Formula is fully supported on Mac. Extra hints and extra shuffles are available for purchase. ## Key features - 3D Mahjong puzzle gameplay - IQ-test style tiles - Layered 3D levels - Hint and shuffle options - Leaderboard competition - VoiceOver accessibility ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Hint | $0.99 | one-time | | Shuffle | $0.99 | one-time | ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/clue-formula/id1616776014/reviews.md ### 5/5 — Mahjong puzzle *2026-08-21* I usually play x2lines other games since I really like their role-playing stuff, so I wanted to see how they did with this one. Clue formula is a mahjong puzzle and it is honestly so fun. Just a heads up, it is very challenging and definitely not easy to beat. I love that it actually makes you think instead of being boring. If you want a puzzle game that gives your brain a real workout - you should download ☺️ ### 5/5 — Fun, with Surprising Depth *2026-08-17* This is a satisfying matching game. I especially enjoy planning out which matches are most likely to give me the most options in the future. ### 5/5 — It is like mahjong *2026-07-05* I am 75 years old and this game is a lot of fun. It is like mahjong but it really makes you think because the symbols force you to spot patterns. It is definitely more challenging than the classic version, which I like because it keeps my brain active. The only thing I would change is adding some cooler visual effects when you pass a level to make it look even better. Still, it is a great puzzle game and I really enjoy playing it. ### 5/5 — Mahjong puzzle *2026-07-01* I usually play x2lines other games since I really like their role-playing stuff, so I wanted to see how they did with this one… Clue formula is a mahjong puzzle and it is honestly so fun. Just a heads up, it is very challenging and definitely not easy to beat. I love that it actually makes you think instead of being boring… If you want a puzzle game that gives your brain a real workout - you should download ☺️ ## Frequently asked questions about Clue Formula ### What is Clue Formula? Clue Formula is a 3D Mahjong puzzle game that uses IQ-test style tiles. The objective is to clear all levels by removing matching pairs of tiles that are selectable. ### How do you play Clue Formula? In Clue Formula, you remove tiles by finding matching pairs. A tile is selectable only if it's at the end of a row with no adjacent tiles on the same layer. You must find pairs where both tiles are selectable to clear a level. ### Does Clue Formula have ads? Yes, Clue Formula contains advertisements. It is a free-to-play game that also offers in-app purchases for extra hints and shuffles. ### What devices can I play Clue Formula on? Clue Formula is available on Mac, iPhone, iPad, and iPod. It is fully playable with VoiceOver for accessibility. ### Is Clue Formula challenging? Yes, each new level in Clue Formula becomes more challenging as you advance. The game offers increasing difficulty to keep players engaged. ### Can I get help in Clue Formula? Yes, Clue Formula provides a hint feature that shows all selectable matching pairs. A shuffle option can rearrange the remaining tiles to help you continue a level. Extra hints and shuffles are available for purchase. ### How often is Clue Formula updated? Clue Formula was last updated on July 3, 2026, to version 1.24.1. This indicates a recent update, suggesting ongoing support and development. ### What is the age rating for Clue Formula? Clue Formula has an age rating of 4+. This means it is suitable for children aged 4 and older. ## Version history (last 5 releases) ### 1.27.1 — 2026-08-22 Welcome to the latest Clue Formula update! We've fixed issues and added enhancements for a smoother experience. Enjoy optimized graphics, enhanced playing comfort, and reliability. Explore new features. Stay connected on Facebook for updates. Thanks for being part of Clue Formula! https://www.facebook.com/clueformula ### 1.26.1 — 2026-08-20 Welcome to the latest Clue Formula update! We've fixed issues and added enhancements for a smoother experience. Enjoy optimized graphics, enhanced playing comfort, and reliability. Explore new features. Stay connected on Facebook for updates. Thanks for being part of Clue Formula! https://www.facebook.com/clueformula ### 1.25.1 — 2026-07-07 Welcome to the latest Clue Formula update! We've fixed issues and added enhancements for a smoother experience. Enjoy optimized graphics, enhanced playing comfort, and reliability. Explore new features. Stay connected on Facebook for updates. Thanks for being part of Clue Formula! https://www.facebook.com/clueformula ### 1.24.1 — 2026-07-03 Welcome to the latest Clue Formula update! We've fixed issues and added enhancements for a smoother experience. Enjoy optimized graphics, enhanced playing comfort, and reliability. Explore new features. Stay connected on Facebook for updates. Thanks for being part of Clue Formula! https://www.facebook.com/clueformula ### 1.23.1 — 2026-07-02 Welcome to the latest Clue Formula update! We've fixed issues and added enhancements for a smoother experience. In this release we fixed a few bugs. Enjoy optimized graphics, enhanced playing comfort, and reliability. Explore new features. Stay connected on Facebook for updates. Thanks for being part of Clue Formula! https://www.facebook.com/clueformula ## More apps by x2line.com LLC - [Baby Adopter](https://appshunter.io/ios/app/baby-adopter/id425135290) - [Baby Adopter Pro](https://appshunter.io/ios/app/baby-adopter-pro/id428754657) - [Little Girl Magic](https://appshunter.io/ios/app/little-girl-magic/id446509719) - [Baby Adopter Holidays](https://appshunter.io/ios/app/baby-adopter-holidays/id481873578) - [Baby Adopter Sea](https://appshunter.io/ios/app/baby-adopter-sea/id731410493) - [Cafe Formula](https://appshunter.io/ios/app/cafe-formula/id732080115) All apps by x2line.com LLC: https://appshunter.io/developer/425135293 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*