vDiffraction vs NumAndShape
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
vDiffraction
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This game is a fun way to discover the world of crystals and their symmetries through diffraction. Crystals are all around us: in our environment (rocks and minerals, etc), in our bodies (sugar, bones, gallstones, etc.) and in technology (metals and alloys, silicon and quartz used for microelectronics, etc.). By successively discovering the diffraction of X-rays, neutrons and electrons, scientists in the twentieth century threw the door to the microscopic world wide open by demonstrating that crystals are made โโup of atoms and molecules and explaining their structure. Crystals are characterised by the fact that their constituents are arranged in a highly ordered structure. This internal order and its symmetry is clearly visible in the diffraction patterns produced by any crystal. It is this symmetry which is also gives crystals their often amazing shapes, making them highly prized by rockhounds. Whether you are a senior scientist, a student, or just curious about science, vDiffraction is a serious game that will let you try your hand at crystal diffraction so that you can begin to understand how scientists identify the symmetry characteristics of a crystal. This is the first, crucial step towards understanding the atomic and molecular structure of a crystalline material, in other words what type of atoms and molecules make up the crystal and how they are organised.
NumAndShape
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free content - addition - subtraction - multiplication - division - average - summation - area of triangle - area of circle paid content - prime number - power - per hour - binary number - sin cos tan NumAndShape Unlimited - Available including current paid content and paid content that will be added later - Hide advertisements
Screenshots
Verdict
The clearest difference is in-app purchases: vDiffraction at none against NumAndShape's 6. vDiffraction also leads on ads (none vs shown) and iOS requirement (8.0 vs 16.6). On price and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. NumAndShape sells 6 one-off in-app purchases. vDiffraction asks for nothing beyond the download.
| Parameter | vDiffraction | NumAndShape |
|---|---|---|
| Price | Free | Free |
| Update frequency | โ | Every 2 months |
| Ads | No โ better | Yes |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 8.0 โ better | 16.6 |
| Further details โ not scored | ||
| Size | 32 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Institut Laue-Langevin | ken morobayashi |
In-app purchases
vDiffraction
No in-app purchases
NumAndShape
- prime number$0.49
- power$0.49
- per hour$0.49
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- binary number$0.49
- sin cos tan$0.49
- NumAndShape Unlimited$1.99
Questions
Is vDiffraction free?
Is NumAndShape free?
Do vDiffraction or NumAndShape have ads?
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