# PreviewFit vs JSON Formatter Viewer

The clearest difference is in-app purchases: PreviewFit at none against JSON Formatter Viewer's 2. PreviewFit also leads on update cadence (every 2 weeks vs every 6 weeks) and device support (3 vs 1). JSON Formatter Viewer's advantage is chart position (#200 vs unranked) and iOS requirement (17.0 vs 26.0). On price and ads 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. PreviewFit asks for nothing beyond the download.

PreviewFit ships an update every 2 weeks, JSON Formatter Viewer every 6 weeks. The most recent releases landed on October 7, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | PreviewFit | JSON Formatter Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | Free | — |
| Best chart rank | — | **#200** |
| Size | 6 MB | 5 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Appmost AB](https://appshunter.io/developer/1656662512) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### PreviewFit

[App page](https://appshunter.io/ios/app/previewfit-app-preview-fixer/id6765727606)

Easily transform screen recordings into App Store-ready preview videos. This tool automatically detects orientation and dimensions, trims to 30 seconds, and removes black bars for a clean export. It's designed for developers and marketers to create professional app preview content.

**Highlights:** Smart device output suggestions, Resize and center-crop, 30-second trimming, MOV and MP4 export, Optional audio removal, App Store requirement checks

**In-app purchases:** none


### JSON Formatter Viewer

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

**Currently charting:** #200 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 PreviewFit free?

PreviewFit 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 PreviewFit or JSON Formatter Viewer have ads?

Neither PreviewFit nor JSON Formatter Viewer shows ads.

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

PreviewFit ships an update every 2 weeks, and JSON Formatter Viewer every 6 weeks. Most recently, PreviewFit was updated on October 7, 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.*