# Feynman WTF vs Calculus Path

The clearest difference is in-app purchases: Calculus Path at none against Feynman WTF's 2. Calculus Path also leads on update cadence (daily vs weekly). 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. Calculus Path asks for nothing beyond the download.

Feynman WTF ships an update weekly, Calculus Path daily. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Feynman WTF | Calculus Path |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Size | 37 MB | 6 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vrushal Kapadnis](https://appshunter.io/developer/1830846117) | [Alaric Pow Ian-Jun](https://appshunter.io/developer/6808502683) |

## 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 |


### Calculus Path

[App page](https://appshunter.io/ios/app/calculus-path/id6808502681)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Feynman WTF free?

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

### Is Calculus Path free?

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

### Do Feynman WTF or Calculus Path have ads?

Neither Feynman WTF nor Calculus Path shows ads.

### Which is updated more often, Feynman WTF or Calculus Path?

Feynman WTF ships an update weekly, and Calculus Path daily. Most recently, Feynman WTF was updated on November 5, 2026 and Calculus Path on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*