# Feynman rules vs PrecisionRush

The clearest difference is in-app purchases: Feynman rules at none against PrecisionRush's 4. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PrecisionRush sells 4 one-off in-app purchases. Feynman rules asks for nothing beyond the download.

## The numbers

| Metric | Feynman rules | PrecisionRush |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Size | 6 MB | 7 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [Alexandru Grajdeanu](https://appshunter.io/developer/1843186339) |

## What reviewers say

### Feynman rules

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

**Features:** macOS Compatibility

**In-app purchases:** none


### PrecisionRush

[App page](https://appshunter.io/ios/app/precisionrush/id6755596108)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $4.99 | one-time |
| Medium Tip | $9.99 | one-time |
| Large Tip | $24.99 | one-time |
| Generous Tip | $49.99 | one-time |


## Frequently asked questions

### Is Feynman rules free?

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

### Is PrecisionRush free?

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

### Do Feynman rules or PrecisionRush have ads?

Neither Feynman rules nor PrecisionRush 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.*