# OpenAPI Viewer vs Headmin!

The clearest difference is in-app purchases: Headmin! at none against OpenAPI Viewer's 3. Headmin! also leads on iOS requirement (15.1 vs 18.1). On price, ads and device support there is nothing between them.

Both are free to download. OpenAPI Viewer sells 3 one-off in-app purchases. Headmin! asks for nothing beyond the download.

## The numbers

| Metric | OpenAPI Viewer | Headmin! |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 13 MB | 19 MB |
| Requires iOS | 18.1 | **15.1** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Victor Manuel Puga Ruiz](https://appshunter.io/developer/1648773908) | [Mendel Fuchs](https://appshunter.io/developer/6783741750) |

## What reviewers say

### OpenAPI Viewer

[App page](https://appshunter.io/ios/app/openapi-viewer/id6761346493)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |


### Headmin!

[App page](https://appshunter.io/ios/app/headmin/id6787483680)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenAPI Viewer free?

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

### Is Headmin! free?

Headmin! is free to download, with no in-app purchases.

### Do OpenAPI Viewer or Headmin! have ads?

Neither OpenAPI Viewer nor Headmin! shows ads.

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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.*