# Clue Stack vs Forest Math

The clearest difference is in-app purchases: Clue Stack at none against Forest Math's 1. Clue Stack also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Forest Math sells 1 one-off in-app purchase. Clue Stack asks for nothing beyond the download.

Clue Stack ships an update every 3 weeks, Forest Math fortnightly. The most recent releases landed on September 20, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Clue Stack | Forest Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Size | 243 MB | 78 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GAMEPROMO CO., LIMITED](https://appshunter.io/developer/1619749576) | [MIGMIG DIJITAL PLATFORM ANONIM SIRKETI](https://appshunter.io/developer/1825868534) |

## What reviewers say

### Clue Stack

[App page](https://appshunter.io/ios/app/clue-stack/id6775158548)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Forest Math

[App page](https://appshunter.io/ios/app/forest-math/id6775507910)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Clue Stack free?

Clue Stack is free to download, with no in-app purchases.

### Is Forest Math free?

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

### Do Clue Stack or Forest Math have ads?

Both Clue Stack and Forest Math show ads.

### Which is updated more often, Clue Stack or Forest Math?

Clue Stack ships an update every 3 weeks, and Forest Math fortnightly. Most recently, Clue Stack was updated on September 20, 2026 and Forest Math on September 26, 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.*