# GUTCalc Physics Unit Converter vs Unit Eater

The clearest difference is update cadence: Unit Eater at every 2 weeks against GUTCalc Physics Unit Converter's every 4 months. On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. GUTCalc Physics Unit Converter sells 1 one-off in-app purchase and Unit Eater sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

GUTCalc Physics Unit Converter ships an update every 4 months, Unit Eater every 2 weeks. Both last shipped on September 11, 2026.

## The numbers

| Metric | GUTCalc Physics Unit Converter | Unit Eater |
| --- | --- | --- |
| Price | Free | Free |
| 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 | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 3 MB | 65 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Timothy Wiser](https://appshunter.io/developer/1526914859) | [Tom Leon Schmidt](https://appshunter.io/developer/1634212175) |

## 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 |


### Unit Eater

[App page](https://appshunter.io/ios/app/unit-eater/id6742549723)

This utility app functions as a powerful calculator that handles unit conversions and calculations. It supports a vast array of predefined units and allows users to define their own, making it ideal for scientific and academic tasks. Features include a calculation history, customizable results, and dark mode.

**Highlights:** Unit conversion and calculation, Custom unit definition, Extensive unit library, Calculation history, Customizable result format, Dark mode

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly | $0.99 | per month |
| Premium - Pay once | $3.99 | one-time |


## Frequently asked questions

### Is GUTCalc Physics Unit Converter free?

GUTCalc Physics Unit Converter is free to download, with in-app purchases available.

### Is Unit Eater free?

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

### Do GUTCalc Physics Unit Converter or Unit Eater have ads?

Neither GUTCalc Physics Unit Converter nor Unit Eater shows ads.

### Which is updated more often, GUTCalc Physics Unit Converter or Unit Eater?

GUTCalc Physics Unit Converter ships an update every 4 months, and Unit Eater every 2 weeks. Most recently, GUTCalc Physics Unit Converter was updated on September 11, 2026 and Unit Eater on September 11, 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.*