# Feynman WTF vs Statistical Inference

The clearest difference is in-app purchases: Statistical Inference at none against Feynman WTF's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Feynman WTF sells 2 in-app purchases, starting at $10.00 per month. Statistical Inference asks for nothing beyond the download.

## The numbers

| Metric | Feynman WTF | Statistical Inference |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | — |
| Size | 37 MB | 38 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vrushal Kapadnis](https://appshunter.io/developer/1830846117) | [AFTW LLC](https://appshunter.io/developer/1886356149) |

## What reviewers say

### Feynman WTF

[App page](https://appshunter.io/ios/app/feynman-wtf/id6749510148)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $10.00 | per month |
| Pro Yearly | $99.99 | per year |


### Statistical Inference

[App page](https://appshunter.io/ios/app/statistical-inference/id6773749666)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Feynman WTF free?

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

### Is Statistical Inference free?

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

### Do Feynman WTF or Statistical Inference have ads?

Neither Feynman WTF nor Statistical Inference 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.*