# ClearMath vs 9

The clearest difference is ads: ClearMath at none against 9's shown. ClearMath also leads on update cadence (every 5 days vs every 5 weeks). 9's advantage is iOS requirement (14.0 vs 17). On price, in-app purchases and device support there is nothing between them.

Both are free to download. ClearMath sells 2 in-app purchases, starting at $12.99 per month and 9 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ClearMath ships an update every 5 days, 9 every 5 weeks. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | ClearMath | 9 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/clearmath/id6670290377/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 26 MB |
| Requires iOS | 17 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kunshan Lefan Software Technology Co.,Ltd.](https://appshunter.io/developer/452703256) | [Okko Meijer](https://appshunter.io/developer/1881299592) |

## What reviewers say

### ClearMath

[App page](https://appshunter.io/ios/app/clearmath/id6670290377)

This app helps you deeply understand mathematical concepts by visualizing their relationships and connections. It offers guided learning paths, detailed explanations, and practical examples to build lasting knowledge beyond just getting answers.

**Highlights:** Concept Relationship Maps, Hierarchical Tree Structure, Comprehensive Concept Explanations, Guided Learning Paths, Progress Tracking, Mathematician Profiles, AI Explanations

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $12.99 | per month |
| Annual | $99.99 | per year |


### 9

[App page](https://appshunter.io/ios/app/9-box/id6761386274)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Verwijder advertenties | $2.99 | one-time |


## Frequently asked questions

### Is ClearMath free?

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

### Is 9 free?

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

### Do ClearMath or 9 have ads?

9 shows ads; ClearMath does not.

### Which is updated more often, ClearMath or 9?

ClearMath ships an update every 5 days, and 9 every 5 weeks. Most recently, ClearMath was updated on October 2, 2026 and 9 on October 5, 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.*