# Riddle Doodles vs Feynman rules

The clearest difference is in-app purchases: Feynman rules at none against Riddle Doodles's 1. Feynman rules also leads on ads (none vs shown). Riddle Doodles's advantage is iOS requirement (9.0 vs 16.0). On price and device support there is nothing between them.

Both are free to download. Riddle Doodles sells 1 one-off in-app purchase. Feynman rules asks for nothing beyond the download.

## The numbers

| Metric | Riddle Doodles | Feynman rules |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/riddle-doodles/id1609084388/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 6 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pawel Delimata](https://appshunter.io/developer/1017402848) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### Riddle Doodles

[App page](https://appshunter.io/ios/app/riddle-doodles/id1609084388)

Engage your mind with a collection of unique riddles and puzzles. Play at your own pace, with options for hints and solutions when you get stuck. A relaxing and fun experience for all ages.

**Highlights:** 51 unique puzzles, Play at your own pace, Hints available, Solutions provided, Relaxing gameplay

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $1.99 | one-time |


### Feynman rules

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Riddle Doodles free?

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

### Is Feynman rules free?

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

### Do Riddle Doodles or Feynman rules have ads?

Riddle Doodles shows ads; Feynman rules does not.

---

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