# Birefringence vs QRCodestom

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

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

## The numbers

| Metric | Birefringence | QRCodestom |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.8 (9 ratings)](https://appshunter.io/ios/app/birefringence/id1354688131/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Monetization | Paid | — |
| Size | 14 MB | 137 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Barlow](https://appshunter.io/developer/1229786938) | [志炜 彭](https://appshunter.io/developer/1665582876) |

## What reviewers say

### Birefringence

[App page](https://appshunter.io/ios/app/birefringence/id1354688131)

This interactive tool helps identify minerals by calculating birefringence based on observed color and section thickness. It features a comprehensive database and offers two display modes for clarity.

**Highlights:** Interactive Michel-Lévy color chart, Database of 562 minerals, Automatic birefringence calculation, Adjustable chart range (200-2500 nm), Simple display mode, Includes optical and physical mineral characteristics

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

**In-app purchases:** none


### QRCodestom

[App page](https://appshunter.io/ios/app/qrcodestom/id6739247469)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP | $4.99 | one-time |


## Frequently asked questions

### Is Birefringence free?

Birefringence costs $2.99, with no in-app purchases.

### Is QRCodestom free?

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

### Do Birefringence or QRCodestom have ads?

Neither Birefringence nor QRCodestom 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.*