# Physics 9 vs ExplainByExample

The clearest difference is device support: Physics 9 at 3 against ExplainByExample's —. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Physics 9 | ExplainByExample |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Size | 20 MB | 25 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Dung Nguyen Tan](https://appshunter.io/developer/1861117383) | [Dat Tran Nam](https://appshunter.io/developer/1893532641) |

## What reviewers say

### Physics 9

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

**Features:** macOS Compatibility

**In-app purchases:** none


### ExplainByExample

[App page](https://appshunter.io/ios/app/explainbyexample/id6762246398)

**In-app purchases:** none


## Frequently asked questions

### Is Physics 9 free?

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

### Is ExplainByExample free?

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

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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.*