# Physics Heist By Professor vs Math 9

The clearest difference is in-app purchases: Math 9 at none against Physics Heist By Professor's 1. Math 9 also leads on update cadence (every 2 days vs every 6 months) and iOS requirement (13.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. Physics Heist By Professor sells 1 one-off in-app purchase. Math 9 asks for nothing beyond the download.

Physics Heist By Professor ships an update every 6 months, Math 9 every 2 days. The most recent releases landed on September 10, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Physics Heist By Professor | Math 9 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 days** |
| Size | 322 MB | 22 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Spayee Labs](https://appshunter.io/developer/1219640854) | [Dung Do Tri](https://appshunter.io/developer/1861127929) |

## What reviewers say

### Physics Heist By Professor

[App page](https://appshunter.io/ios/app/physics-heist-by-professor/id6756004247)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Training Course P | $9.99 | one-time |


### Math 9

[App page](https://appshunter.io/ios/app/math-9/id6756517572)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Physics Heist By Professor free?

Physics Heist By Professor is free to download, with in-app purchases available.

### Is Math 9 free?

Math 9 is free to download, with no in-app purchases.

### Do Physics Heist By Professor or Math 9 have ads?

Neither Physics Heist By Professor nor Math 9 shows ads.

### Which is updated more often, Physics Heist By Professor or Math 9?

Physics Heist By Professor ships an update every 6 months, and Math 9 every 2 days. Most recently, Physics Heist By Professor was updated on September 10, 2026 and Math 9 on September 9, 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.*