# JSON Master vs Sign PDF

The clearest difference is ads: Sign PDF at none against JSON Master's shown. JSON Master's advantage is update cadence (every 9 days vs monthly) and iOS requirement (15.0 vs 17.6). On price, in-app purchases 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 and Sign PDF sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

JSON Master ships an update every 9 days, Sign PDF monthly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | JSON Master | Sign PDF |
| --- | --- | --- |
| 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** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 41 MB | 15 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tianjin Illuso Information Technology Co., Ltd.](https://appshunter.io/developer/1864792206) | [RUEBEN ANSOLIWEN AKANKOBATENG](https://appshunter.io/developer/1880083403) |

## 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 (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 |


### Sign PDF

[App page](https://appshunter.io/ios/app/sign-pdf-document-signer/id6760923475)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All access monthly | $4.99 | per month |
| All access yearly | $24.99 | per year |
| All access Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is JSON Master free?

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

### Is Sign PDF free?

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

### Do JSON Master or Sign PDF have ads?

JSON Master shows ads; Sign PDF does not.

### Which is updated more often, JSON Master or Sign PDF?

JSON Master ships an update every 9 days, and Sign PDF monthly. Most recently, JSON Master was updated on October 24, 2026 and Sign PDF on October 28, 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.*