# Jeyso vs JSON Formatter Viewer

The clearest difference is in-app purchases: Jeyso at none against JSON Formatter Viewer's 2. JSON Formatter Viewer's advantage is chart position (#188 vs unranked). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. JSON Formatter Viewer sells 2 in-app purchases, starting at $3.99 per 7 days. Jeyso asks for nothing beyond the download.

Jeyso ships an update monthly, JSON Formatter Viewer every 6 weeks. The most recent releases landed on October 12, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Jeyso | JSON Formatter Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Best chart rank | — | **#188** |
| Size | 5 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Umit UZ](https://appshunter.io/developer/1842858860) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### Jeyso

[App page](https://appshunter.io/ios/app/jeyso-json-diff-and-formatter/id6758353863)

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

**In-app purchases:** none


### JSON Formatter Viewer

[App page](https://appshunter.io/ios/app/json-formatter-viewer/id6772269691)

**Currently charting:** #188 Top Grossing · Developer Tools (US App Store)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Yearly | $19.99 | per year |


## Frequently asked questions

### Is Jeyso free?

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

### Is JSON Formatter Viewer free?

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

### Do Jeyso or JSON Formatter Viewer have ads?

Neither Jeyso nor JSON Formatter Viewer shows ads.

### Which is updated more often, Jeyso or JSON Formatter Viewer?

Jeyso ships an update monthly, and JSON Formatter Viewer every 6 weeks. Most recently, Jeyso was updated on October 12, 2026 and JSON Formatter Viewer on October 19, 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.*