# Feynman rules vs Stellaria

The clearest difference is in-app purchases: Feynman rules at none against Stellaria's 1. Feynman rules also leads on iOS requirement (16.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Stellaria sells 1 one-off in-app purchase. Feynman rules asks for nothing beyond the download.

## The numbers

| Metric | Feynman rules | Stellaria |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Size | 6 MB | 7 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [LUIS FERNANDO LENDRINO DiAZ](https://appshunter.io/developer/6811068098) |

## What reviewers say

### Feynman rules

[App page](https://appshunter.io/ios/app/feynman-rules/id6478752222)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stellaria

[App page](https://appshunter.io/ios/app/stellaria-polyhedra-puzzle/id6811068096)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The full game | $4.99 | one-time |


## Frequently asked questions

### Is Feynman rules free?

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

### Is Stellaria free?

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

### Do Feynman rules or Stellaria have ads?

Neither Feynman rules nor Stellaria 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.*