# Physics 9 vs Grade 9 Math Mastery

The clearest difference is in-app purchases: Physics 9 at none against Grade 9 Math Mastery's 2. Physics 9 also leads on iOS requirement (13.0 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. Physics 9 asks for nothing beyond the download.

## The numbers

| Metric | Physics 9 | Grade 9 Math Mastery |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 months |
| Size | 20 MB | 7 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dung Nguyen Tan](https://appshunter.io/developer/1861117383) | [Eager.app](https://appshunter.io/developer/1550371160) |

## What reviewers say

### Physics 9

[App page](https://appshunter.io/ios/app/physics-9/id6756515845)

**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 Physics 9 free?

Physics 9 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 Physics 9 or Grade 9 Math Mastery have ads?

Neither Physics 9 nor Grade 9 Math Mastery shows ads.

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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.*