# Feynman WTF vs PubMinder

The clearest difference is update cadence: Feynman WTF at weekly against PubMinder's every 5 weeks. Feynman WTF also leads on iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Feynman WTF sells 2 in-app purchases, starting at $10.00 per month and PubMinder sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Feynman WTF ships an update weekly, PubMinder every 5 weeks. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Feynman WTF | PubMinder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 5 weeks |
| Size | 37 MB | 8 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Vrushal Kapadnis](https://appshunter.io/developer/1830846117) | [BRANDI LYNN CANTAREL](https://appshunter.io/developer/6785067075) |

## 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 |


### PubMinder

[App page](https://appshunter.io/ios/app/pubminder/id6785066503)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Preprint Sources Unlock | $4.99 | one-time |


## Frequently asked questions

### Is Feynman WTF free?

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

### Is PubMinder free?

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

### Do Feynman WTF or PubMinder have ads?

Neither Feynman WTF nor PubMinder shows ads.

### Which is updated more often, Feynman WTF or PubMinder?

Feynman WTF ships an update weekly, and PubMinder every 5 weeks. Most recently, Feynman WTF was updated on October 9, 2026 and PubMinder on October 6, 2026.

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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.*