# MainOrNot vs JSON Formatter Viewer

The clearest difference is in-app purchases: MainOrNot at none against JSON Formatter Viewer's 2. JSON Formatter Viewer's advantage is chart position (#200 vs unranked) and iOS requirement (17.0 vs 26.0). 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. MainOrNot asks for nothing beyond the download.

MainOrNot ships an update every 2 months, JSON Formatter Viewer every 6 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | MainOrNot | JSON Formatter Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mainornot/id6752519866/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | — |
| Best chart rank | — | **#200** |
| Size | 7 MB | 5 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Joey Barbier](https://appshunter.io/developer/568751299) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### MainOrNot

[App page](https://appshunter.io/ios/app/mainornot/id6752519866)

An interactive platform to master modern Swift concurrency concepts. Explore async/await, actors, and structured concurrency with real-time code execution and thread visualization. Learn by doing with hands-on examples.

**Highlights:** Real-time code execution, Thread visualization, Interactive examples, Complete concurrency coverage, Swift 6 ready features, Localized in 6 languages

**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:** #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 MainOrNot free?

MainOrNot 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 MainOrNot or JSON Formatter Viewer have ads?

Neither MainOrNot nor JSON Formatter Viewer shows ads.

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

MainOrNot ships an update every 2 months, and JSON Formatter Viewer every 6 weeks. Most recently, MainOrNot was updated on November 5, 2026 and JSON Formatter Viewer on October 31, 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.*