# JSONDoc vs OpenAPI Viewer

JSONDoc and OpenAPI Viewer are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. JSONDoc sells 3 in-app purchases, starting at $3.99 per month and OpenAPI Viewer sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

JSONDoc ships an update every 3 weeks, OpenAPI Viewer every 2 weeks. The most recent releases landed on September 30, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | JSONDoc | OpenAPI Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/jsondoc/id6462685403/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 13 MB |
| Requires iOS | 18.6 | **18.1** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Rahul Katariya](https://appshunter.io/developer/1680332229) | [Victor Manuel Puga Ruiz](https://appshunter.io/developer/1648773908) |

## What reviewers say

### JSONDoc

[App page](https://appshunter.io/ios/app/jsondoc/id6462685403)

This app transforms complex JSON models into visual diagrams for easier understanding and communication. It ensures all your data remains on your device for complete privacy and security.

**Highlights:** Transforms JSON models into visual diagrams, Enhances readability of complex data, Keeps all JSON documents on your computer, Easy-to-use interface, Secure data handling

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Yearly | $19.99 | per year |
| Lifetime | $29.99 | one-time |


### 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 |


## Frequently asked questions

### Is JSONDoc free?

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

### Is OpenAPI Viewer free?

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

### Do JSONDoc or OpenAPI Viewer have ads?

Neither JSONDoc nor OpenAPI Viewer shows ads.

### Which is updated more often, JSONDoc or OpenAPI Viewer?

JSONDoc ships an update every 3 weeks, and OpenAPI Viewer every 2 weeks. Most recently, JSONDoc was updated on September 30, 2026 and OpenAPI Viewer on October 5, 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.*