# Refractive vs GemDetector App

The clearest difference is iOS requirement: Refractive at 10 against GemDetector App's 15.1. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Refractive | GemDetector App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/refractive/id339056990/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | — |
| Monetization | Free | — |
| Size | 20 MB | 23 MB |
| Requires iOS | **10** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Xavier Daxhelet](https://appshunter.io/developer/339056993) | [Viktoria Fiesinger](https://appshunter.io/developer/1893294360) |

## What reviewers say

### Refractive

[App page](https://appshunter.io/ios/app/refractive/id339056990)

This application calculates the refractive index of transparent materials based on wavelength. It assists optical design engineers and students by computing transmission properties, angles, and critical values. Users can also define custom materials for their calculations.

**Highlights:** Refractive index calculation by wavelength, Light transmission angle calculation, Reflection and transmission coefficients, Critical angle and Brewster's angle calculation, Recall of refraction formulas, Custom material definition

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

**In-app purchases:** none


### GemDetector App

[App page](https://appshunter.io/ios/app/gemdetector-app/id6762190481)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Refractive free?

Refractive is free to download, with no in-app purchases.

### Is GemDetector App free?

GemDetector App is free to download, with no in-app purchases.

### Do Refractive or GemDetector App have ads?

Neither Refractive nor GemDetector App 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.*