# IsatHub Voice vs JSON Master

The clearest difference is rating: JSON Master at 4.6 against IsatHub Voice's 1.0. JSON Master also leads on update cadence (every 9 days vs every 4 months) and ratings volume (5 vs 1). IsatHub Voice's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. JSON Master sells 3 in-app purchases, starting at $2.99 per 7 days. IsatHub Voice asks for nothing beyond the download.

JSON Master holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: JSON Master has 5 ratings behind it against 1, so its average is the more settled of the two.

IsatHub Voice ships an update every 4 months, JSON Master every 9 days. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | IsatHub Voice | JSON Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/isathub-voice/id895474692/reviews) | **[4.6 (5 ratings)](https://appshunter.io/ios/app/json-master-editor-and-viewer/id6757484875/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 136 MB | 41 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Inmarsat Global Limited](https://appshunter.io/developer/883350935) | [Tianjin Illuso Information Technology Co., Ltd.](https://appshunter.io/developer/1864792206) |

## What reviewers say

### IsatHub Voice

[App page](https://appshunter.io/ios/app/isathub-voice/id895474692)

This application allows your smart device to make calls and send/receive SMS messages using a satellite network, providing connectivity outside of traditional cellular coverage. It integrates with your device's native contact list and offers call recording and history features.

**Highlights:** Make calls and send SMS over satellite, Works with IsatHub terminal, Uses device's native contact list, Call recording, Call history, SMS support

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JSON Master Pro (Weekly) | $2.99 | per 7 days |
| Pro (Yearly) | $14.99 | per year |
| JSON Master Pro Lifetime | $17.99 | one-time |


## Frequently asked questions

### Is IsatHub Voice free?

IsatHub Voice is free to download, with no in-app purchases.

### Is JSON Master free?

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

### Which has better reviews, IsatHub Voice or JSON Master?

JSON Master is rated higher. IsatHub Voice averages 1.0 out of 5 from 1 ratings, while JSON Master averages 4.6 from 5 ratings.

### Do IsatHub Voice or JSON Master have ads?

JSON Master shows ads; IsatHub Voice does not.

### Which is updated more often, IsatHub Voice or JSON Master?

IsatHub Voice ships an update every 4 months, and JSON Master every 9 days. Most recently, IsatHub Voice was updated on November 1, 2026 and JSON Master on October 24, 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.*