# SISTER 進發 vs JSON Viewer & Formatter

The clearest difference is in-app purchases: SISTER 進發 at none against JSON Viewer & Formatter's 3. SISTER 進發 also leads on ads (none vs shown) and iOS requirement (13.0 vs 17). JSON Viewer & Formatter's advantage is update cadence (weekly vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. JSON Viewer & Formatter sells 3 in-app purchases, starting at $1.99 per 7 days. SISTER 進發 asks for nothing beyond the download.

SISTER 進發 ships an update every 5 weeks, JSON Viewer & Formatter weekly. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | SISTER 進發 | JSON Viewer & Formatter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/json-viewer-and-formatter/id6754194710/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 18 MB | 5 MB |
| Requires iOS | **13.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GT MARKET CONSULTING CO., LTD.](https://appshunter.io/developer/927846054) | [Muhammad Mujahid Khan](https://appshunter.io/developer/1749120554) |

## What reviewers say

### SISTER 進發

[App page](https://appshunter.io/ios/app/sister/id1198930609)

**Features:** macOS Compatibility

**In-app purchases:** none


### JSON Viewer & Formatter

[App page](https://appshunter.io/ios/app/json-viewer-and-formatter/id6754194710)

Format, validate, and compare JSON data offline on your iPhone or iPad. This tool offers a tree view, search functionality, and custom themes for efficient data management. Export JSON to various formats and handle large files smoothly.

**Highlights:** Beautify & Minify JSON, Import JSON files or paste from clipboard, Export JSON to CSV, XML, YAML, Interactive Tree View Explorer, Search JSON Keys & Values, Compare Two JSONs, Offline functionality

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $4.99 | per month |
| Yearly | $24.99 | per year |


## Frequently asked questions

### Is SISTER 進發 free?

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

### Is JSON Viewer & Formatter free?

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

### Do SISTER 進發 or JSON Viewer & Formatter have ads?

JSON Viewer & Formatter shows ads; SISTER 進發 does not.

### Which is updated more often, SISTER 進發 or JSON Viewer & Formatter?

SISTER 進發 ships an update every 5 weeks, and JSON Viewer & Formatter weekly. Most recently, SISTER 進發 was updated on November 2, 2026 and JSON Viewer & Formatter on October 30, 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.*