# JSON Formatter Viewer vs Nara Mobile AI Lab

The clearest difference is in-app purchases: Nara Mobile AI Lab at none against JSON Formatter Viewer's 2. Nara Mobile AI Lab also leads on update cadence (every 2 days vs every 6 weeks). JSON Formatter Viewer's advantage is iOS requirement (17.0 vs 26.0). On price, 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. Nara Mobile AI Lab asks for nothing beyond the download.

JSON Formatter Viewer ships an update every 6 weeks, Nara Mobile AI Lab every 2 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | JSON Formatter Viewer | Nara Mobile AI Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Size | 5 MB | 109 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Phuc Pham](https://appshunter.io/developer/1893081423) | [Narasystem LLC](https://appshunter.io/developer/1896385706) |

## What reviewers say

### JSON Formatter Viewer

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

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

**In-app purchases (2)**

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


### Nara Mobile AI Lab

[App page](https://appshunter.io/ios/app/nara-mobile-ai-lab/id6779423323)

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

**In-app purchases:** none


## Frequently asked questions

### Is JSON Formatter Viewer free?

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

### Is Nara Mobile AI Lab free?

Nara Mobile AI Lab is free to download, with no in-app purchases.

### Do JSON Formatter Viewer or Nara Mobile AI Lab have ads?

Neither JSON Formatter Viewer nor Nara Mobile AI Lab shows ads.

### Which is updated more often, JSON Formatter Viewer or Nara Mobile AI Lab?

JSON Formatter Viewer ships an update every 6 weeks, and Nara Mobile AI Lab every 2 days. Most recently, JSON Formatter Viewer was updated on October 28, 2026 and Nara Mobile AI Lab on October 28, 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.*