# Only PGDBA Prep vs Feynman WTF

The clearest difference is in-app purchases: Only PGDBA Prep at none against Feynman WTF's 2. Feynman WTF's advantage is update cadence (weekly vs every 3 months) and iOS requirement (15.1 vs 17.5). On price, ads 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. Only PGDBA Prep asks for nothing beyond the download.

Only PGDBA Prep ships an update every 3 months, Feynman WTF weekly. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Only PGDBA Prep | Feynman WTF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 247 MB | 37 MB |
| Requires iOS | 17.5 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Manjeet Mehta](https://appshunter.io/developer/1188974617) | [Vrushal Kapadnis](https://appshunter.io/developer/1830846117) |

## What reviewers say

### Only PGDBA Prep

[App page](https://appshunter.io/ios/app/only-pgdba-prep/id6478480924)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Only PGDBA Prep free?

Only PGDBA Prep is free to download, with no in-app purchases.

### Is Feynman WTF free?

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

### Do Only PGDBA Prep or Feynman WTF have ads?

Neither Only PGDBA Prep nor Feynman WTF shows ads.

### Which is updated more often, Only PGDBA Prep or Feynman WTF?

Only PGDBA Prep ships an update every 3 months, and Feynman WTF weekly. Most recently, Only PGDBA Prep was updated on October 15, 2026 and Feynman WTF on October 24, 2026.

---

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