Clue Formula vs PRISM
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Clue Formula
Engage in a 3D Mahjong puzzle game featuring IQ-test style tiles. Match selectable pairs to clear levels, with increasing difficulty as you progress. Utilize hints and shuffles to aid your gameplay and compete on leaderboards.
- 3D Mahjong puzzle gameplay
- IQ-test style tiles
- Layered 3D levels
- Hint and shuffle options
- Leaderboard competition
- VoiceOver accessibility
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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.
PRISM
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Turn a mirror and the light finds a new path. Guide the beam through every gem, then into the exit. There is always exactly one true answer. PRISM is a quiet logic puzzle made of light and mirrors. Tap a mirror to flip it between "/" and "\", route the laser through every glowing gem, and land it in the exit to win. The beam redraws instantly with every tap, so you can test ideas and watch them play out. Decoy mirrors that aren't part of the solution create convincing wrong paths, so tapping around won't get you there. FEATURES - One-tap controls: just rotate mirrors - Every board has exactly one solution path, so it's logic, not luck - Four difficulty levels (8x8 to 11x11), from gentle to brutal - A daily puzzle with a solving streak - 16 achievements, plus a clear celebration for personal bests and badges - Stats for solves, average time, and no-hint rate - Board color themes: Sky, Gold, Indigo, Jade, and Sakura - No account needed, and it plays offline - English and Japanese GREAT FOR - Turning a commute or coffee break into ten minutes of focus - Fans of logic puzzles that reward reasoning - Anyone who finds most puzzle apps too easy - People who like calm, minimal design - A one-puzzle-before-bed ritual PRIVACY Your progress stays on your device and is never sent anywhere. No account, no personal details, no tracking. To introduce our other apps, PRISM may load public App Store information such as app names and icons.
Screenshots
Verdict
The clearest difference is ads: PRISM at none against Clue Formula's shown. Clue Formula's advantage is update cadence (every 4 days vs fortnightly). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Clue Formula sells 2 one-off in-app purchases and PRISM sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Clue Formula ships an update every 4 days, PRISM fortnightly. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.
| Parameter | Clue Formula | PRISM |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 4 days — better | Fortnightly |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 22 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | x2line.com LLC | torankirite |
In-app purchases
Clue Formula
- Hint$0.99
- Shuffle$0.99
PRISM
- Premium$4.99









