# Knowledge Hub Pro vs Grade 9 Math Mastery

The clearest difference is in-app purchases: Knowledge Hub Pro at none against Grade 9 Math Mastery's 2. Knowledge Hub Pro also leads on update cadence (monthly vs every 5 months) and iOS requirement (9.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Grade 9 Math Mastery sells 2 in-app purchases, starting at $4.99 per month. Knowledge Hub Pro asks for nothing beyond the download.

Knowledge Hub Pro ships an update monthly, Grade 9 Math Mastery every 5 months. The most recent releases landed on September 23, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Knowledge Hub Pro | Grade 9 Math Mastery |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/knowledge-hub-pro/id1477584908/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free | — |
| Size | 47 MB | 7 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MIT iOS APP](https://appshunter.io/developer/1167867475) | [Eager.app](https://appshunter.io/developer/1550371160) |

## What reviewers say

### Knowledge Hub Pro

[App page](https://appshunter.io/ios/app/knowledge-hub-pro/id1477584908)

Access a wide range of online courses on your mobile device to acquire new skills. Watch course videos offline, engage in discussions, and test your knowledge with quizzes.

**Highlights:** View enrolled courses, Discover new courses, Download videos for offline viewing, Discussion topics, Quizzes with answers

**Features:** macOS Compatibility

**In-app purchases:** none


### Grade 9 Math Mastery

[App page](https://appshunter.io/ios/app/grade-9-math-mastery/id6760619466)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grade 9 Math Mastery — Monthly | $4.99 | per month |
| Grade 9 Math Mastery — Annual | $29.99 | per year |


## Frequently asked questions

### Is Knowledge Hub Pro free?

Knowledge Hub Pro is free to download, with no in-app purchases.

### Is Grade 9 Math Mastery free?

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

### Do Knowledge Hub Pro or Grade 9 Math Mastery have ads?

Neither Knowledge Hub Pro nor Grade 9 Math Mastery shows ads.

### Which is updated more often, Knowledge Hub Pro or Grade 9 Math Mastery?

Knowledge Hub Pro ships an update monthly, and Grade 9 Math Mastery every 5 months. Most recently, Knowledge Hub Pro was updated on September 23, 2026 and Grade 9 Math Mastery on September 29, 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.*