# GUTCalc Physics Unit Converter vs JSON Viewer(Pro)

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

GUTCalc Physics Unit Converter is free to download; JSON Viewer(Pro) costs $2.99 up front. GUTCalc Physics Unit Converter sells 1 one-off in-app purchase. JSON Viewer(Pro) asks for nothing beyond the download.

## The numbers

| Metric | GUTCalc Physics Unit Converter | JSON Viewer(Pro) |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/gutcalc-physics-unit-converter/id1526914857/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 64 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [Timothy Wiser](https://appshunter.io/developer/1526914859) | [Hrishi Suthar](https://appshunter.io/developer/1660005858) |

## What reviewers say

### GUTCalc Physics Unit Converter

[App page](https://appshunter.io/ios/app/gutcalc-physics-unit-converter/id1526914857)

This calculator handles complex physics calculations with units. It supports SI, natural, and CGS units, physical constants, and functions. It automatically converts units and flags algebraic errors, with an option to upgrade for advanced organization and syncing features.

**Highlights:** SI, Natural, and CGS unit modes, Automatic unit conversion, Physical constants and functions, Implied multiplication, Custom keyboards, Unit checking for algebraic errors, Share and save results

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GUTCalc Pro | $2.99 | one-time |


### JSON Viewer(Pro)

[App page](https://appshunter.io/ios/app/json-viewerpro/id6740746553)

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

**In-app purchases:** none


## Frequently asked questions

### Is GUTCalc Physics Unit Converter free?

GUTCalc Physics Unit Converter 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 GUTCalc Physics Unit Converter or JSON Viewer(Pro) have ads?

Neither GUTCalc Physics Unit Converter 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.*