# XML Viewer Converter JSON PDF vs Scientific Engineer Calculator

The clearest difference is price: XML Viewer Converter JSON PDF at Free against Scientific Engineer Calculator's $0.99. XML Viewer Converter JSON PDF also leads on device support (4 vs 2) and iOS requirement (14.0.0 vs 16.6). Scientific Engineer Calculator's advantage is in-app purchases (none vs 4) and update cadence (every 5 days vs fortnightly). On ads there is nothing between them.

XML Viewer Converter JSON PDF is free to download; Scientific Engineer Calculator costs $0.99 up front. XML Viewer Converter JSON PDF sells 4 in-app purchases, starting at $11.99 per month. Scientific Engineer Calculator asks for nothing beyond the download.

XML Viewer Converter JSON PDF ships an update fortnightly, Scientific Engineer Calculator every 5 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | XML Viewer Converter JSON PDF | Scientific Engineer Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.1 (122 ratings)](https://appshunter.io/ios/app/xml-viewer-converter-json-pdf/id1641792040/reviews)** | — |
| Number of ratings | **122** | — |
| Positive reviews | 2.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Subscription | — |
| Size | 51 MB | 6 MB |
| Requires iOS | **14.0.0** | 16.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [NEURASYNC](https://appshunter.io/developer/1639101560) | [Yasin Ercan Ozdemir](https://appshunter.io/developer/1883375624) |

## What reviewers say

### XML Viewer Converter JSON PDF

[App page](https://appshunter.io/ios/app/xml-viewer-converter-json-pdf/id1641792040)

This app allows you to view, edit, convert, and validate XML files. It offers AI-powered XML code generation and converts files to PDF and JSON. Enjoy a user-friendly interface and flexible subscription options.

**Highlights:** View, edit, and save XML files, Convert XML to PDF and JSON, AI-powered XML code generation, Built-in XML validator, User-friendly interface

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access (Monthly) | $11.99 | per month |
| Pro Access (Annual) | $12.99 | per year |
| XML Lifetime Discount | $4.99 | one-time |
| XML Lifetime Premium Access | $7.99 | one-time |


### Scientific Engineer Calculator

[App page](https://appshunter.io/ios/app/scientific-engineer-calculator/id6760608427)

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

**In-app purchases:** none


## Frequently asked questions

### Is XML Viewer Converter JSON PDF free?

XML Viewer Converter JSON PDF is free to download, with in-app purchases available.

### Is Scientific Engineer Calculator free?

Scientific Engineer Calculator costs $0.99, with no in-app purchases.

### Do XML Viewer Converter JSON PDF or Scientific Engineer Calculator have ads?

Neither XML Viewer Converter JSON PDF nor Scientific Engineer Calculator shows ads.

### Which is updated more often, XML Viewer Converter JSON PDF or Scientific Engineer Calculator?

XML Viewer Converter JSON PDF ships an update fortnightly, and Scientific Engineer Calculator every 5 days. Most recently, XML Viewer Converter JSON PDF was updated on October 24, 2026 and Scientific Engineer Calculator on October 31, 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.*