# JSON Master vs ReplyContext

The clearest difference is ads: ReplyContext at none against JSON Master's shown. JSON Master's advantage is update cadence (every 9 days vs every 8 months) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. JSON Master sells 2 in-app purchases, starting at $2.99 per 7 days and ReplyContext sells 6 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

JSON Master ships an update every 9 days, ReplyContext every 8 months. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | JSON Master | ReplyContext |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/json-master-editor-and-viewer/id6757484875/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 8 months |
| Monetization | Free with in-app purchases | — |
| Size | 41 MB | 9 MB |
| Requires iOS | **15.0** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Tianjin Illuso Information Technology Co., Ltd.](https://appshunter.io/developer/1864792206) | [helpful bits GmbH](https://appshunter.io/developer/1678742176) |

## What reviewers say

### JSON Master

[App page](https://appshunter.io/ios/app/json-master-editor-and-viewer/id6757484875)

This offline iOS tool formats, views, validates, and converts JSON data. It supports large files and offers privacy-safe, local processing for developers needing to debug API responses or transform data formats.

**Highlights:** Offline JSON formatting and beautifying, Tree and text view for JSON visualization, Instant JSON syntax validation, JSON to CSV, XML, Excel conversion, Large file support, Import from clipboard and files

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JSON Master Pro (Weekly) | $2.99 | per 7 days |
| Pro (Yearly) | $14.99 | per year |


### ReplyContext

[App page](https://appshunter.io/ios/app/replycontext-ai-reply-writer/id6757863497)

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReplyContext Pro - Weekly | $0.99 | per 7 days |
| ReplyContext Pro - Monthly | $2.99 | per month |
| ReplyContext Pro - Yearly | $29.99 | per year |
| Small Pack | $4.99 | one-time |
| Medium Pack | $9.99 | one-time |
| Large Pack | $19.99 | one-time |


## Frequently asked questions

### Is JSON Master free?

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

### Is ReplyContext free?

ReplyContext is free to download, with in-app purchases available.

### Do JSON Master or ReplyContext have ads?

JSON Master shows ads; ReplyContext does not.

### Which is updated more often, JSON Master or ReplyContext?

JSON Master ships an update every 9 days, and ReplyContext every 8 months. Most recently, JSON Master was updated on October 31, 2026 and ReplyContext on November 1, 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.*