# Feynman diagram vs Bubble Hero.

The clearest difference is in-app purchases: Feynman diagram at none against Bubble Hero.'s 10. Feynman diagram also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Bubble Hero. sells 10 one-off in-app purchases. Feynman diagram asks for nothing beyond the download.

## The numbers

| Metric | Feynman diagram | Bubble Hero. |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 days |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 111 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [IK Software](https://appshunter.io/developer/368549828) |

## What reviewers say

### Feynman diagram

[App page](https://appshunter.io/ios/app/feynman-diagram/id6475814531)

**Features:** macOS Compatibility

**In-app purchases:** none


### Bubble Hero.

[App page](https://appshunter.io/ios/app/bubble-hero/id6757463556)

Free a petrified creature using bubbles in underground passages. Battle enemies like skeletons and floor keepers to advance. Collect bones and rare poses to complete your album.

**Highlights:** Free petrified creatures with bubbles, Defeat skeletons and floor keepers, Collect bones, Discover rare Pojikemo poses, Store poses in an album, Customizable button positions

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 21F Transfer Magic Stone | $2.99 | one-time |
| 31F Transfer Magic Stone | $5.99 | one-time |
| 41F Transfer Magic Stone | $9.99 | one-time |
| 51F Transfer Magic Stone | $11.99 | one-time |
| Buy 500,000 GOLD | $14.99 | one-time |
| 61F Transfer Magic Stone | $14.99 | one-time |
| 71F Transfer Magic Stone | $19.99 | one-time |
| 81F Transfer Magic Stone | $19.99 | one-time |
| 91F Transfer Magic Stone | $24.99 | one-time |
| Buy 1,000,000 GOLD | $29.99 | one-time |


## Frequently asked questions

### Is Feynman diagram free?

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

### Is Bubble Hero. free?

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

### Do Feynman diagram or Bubble Hero. have ads?

Bubble Hero. shows ads; Feynman diagram does not.

---

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