Birefringence vs QRCodestom
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Birefringence
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.
- 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
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An interactive Michel-Lévy interference color chart that features a database of 562 minerals. Click on your observed color and section thickness, and the birefringence of your section will be automatically calculated, and candidate minerals will be suggested. The range of the chart can be be set to between 200 nm and 2500 nm. The chart can be offset by + or - λ, + or - λ/4. The chart can be used as a traditional nomogram, or displayed in a "simple" mode without the clutter of radial lines (which are no longer necessary on an interactive chart). Based on the methods of Sørensen (2013), the colors in the chart are a much truer representation of the colors seen at the microscope eye pieces than existing printed nomograms. The app includes optical and physical characteristics of candidate minerals including birefringence (minimum, maximum and mean), relief, optical character, pleochroism, color and cleavage. The app includes the Raith-Sørensen color chart, which is also interactive. The Raith-Sørensen chart is a direct representation of interference color as a function of birefringence and sample thickness (Sørensen 2013). A useful utility for polarized light microscopy, polariscopy, optical mineralogy, stress optics, or anyone with an interest in birefringent materials.
QRCodestom
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Customization Options: Personalize your QR codes with text, logos, custom corner patterns, and unique bitmap designs. Transform ordinary squares into circles, hearts, star or others. Background Flexibility: Select solid colors or upload your own images to create the perfect backdrop for your QR code. Multi-Purpose Creation: Generate QR codes for various purposes, including text, Wi-Fi networks, contact information, and more. Scan & Edit: Easily scan existing QR codes and give them a makeover with our powerful editing tools. History Tracking: Keep track of your created and scanned QR codes for quick access and reuse. Unlock your creativity and make your QR codes as unique as you are with Qriental. Download now and start designing QR codes that capture attention and spark curiosity!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Birefringence | QRCodestom |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.8 (9 ratings) — better | — |
| Positive reviews | 88.9% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 6 weeks | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 14 MB | 137 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrew Barlow | 志炜 彭 |
In-app purchases
Birefringence
No in-app purchases
QRCodestom
- VIP$4.99
Questions
Is Birefringence free?
Is QRCodestom free?
Do Birefringence or QRCodestom have ads?
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