# DeltaPad vs JSON Viewer Pro

The clearest difference is price: DeltaPad at Free against JSON Viewer Pro's $2.99. JSON Viewer Pro's advantage is in-app purchases (none vs 1) and iOS requirement (17.0 vs 26.2). On ads and device support there is nothing between them.

DeltaPad is free to download; JSON Viewer Pro costs $2.99 up front. DeltaPad sells 1 one-off in-app purchase. JSON Viewer Pro asks for nothing beyond the download.

## The numbers

| Metric | DeltaPad | JSON Viewer Pro |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 8 MB | 3 MB |
| Requires iOS | 26.2 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Olof Petterson](https://appshunter.io/developer/1808256024) | [晨 张](https://appshunter.io/developer/1893394478) |

## What reviewers say

### DeltaPad

[App page](https://appshunter.io/ios/app/deltapad-dev-tools/id6759147374)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DeltaPad PRO | $4.99 | one-time |


### JSON Viewer Pro

[App page](https://appshunter.io/ios/app/json-viewer-pro/id6797175683)

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

**In-app purchases:** none


## Frequently asked questions

### Is DeltaPad free?

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

### Is JSON Viewer Pro free?

JSON Viewer Pro costs $2.99, with no in-app purchases.

### Do DeltaPad or JSON Viewer Pro have ads?

Neither DeltaPad nor JSON Viewer Pro shows ads.

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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.*