# Clue Formula vs PRISM

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.

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.

## The numbers

| Metric | Clue Formula | PRISM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/clue-formula/id1616776014/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 22 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [x2line.com LLC](https://appshunter.io/developer/425135293) | [torankirite](https://appshunter.io/developer/1883564850) |

## What reviewers say

### Clue Formula

[App page](https://appshunter.io/ios/app/clue-formula/id1616776014)

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.

**Highlights:** 3D Mahjong puzzle gameplay, IQ-test style tiles, Layered 3D levels, Hint and shuffle options, Leaderboard competition, VoiceOver accessibility

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hint | $0.99 | one-time |
| Shuffle | $0.99 | one-time |


### PRISM

[App page](https://appshunter.io/ios/app/prism-laser-logic-puzzle/id6791115421)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | one-time |


## Frequently asked questions

### Is Clue Formula free?

Clue Formula is free to download, with in-app purchases available.

### Is PRISM free?

PRISM is free to download, with in-app purchases available.

### Do Clue Formula or PRISM have ads?

Clue Formula shows ads; PRISM does not.

### Which is updated more often, Clue Formula or PRISM?

Clue Formula ships an update every 4 days, and PRISM fortnightly. Most recently, Clue Formula was updated on October 16, 2026 and PRISM on October 18, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*