Comparison

vDiffraction vs NumAndShape

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

vDiffraction

Features
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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 โ€‹โ€‹up 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.

About

NumAndShape

Features
Read full description

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

vDiffraction4 screens
NumAndShape3 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. NumAndShape sells 6 one-off in-app purchases. vDiffraction asks for nothing beyond the download.

Scorecard3 real differences ยท 3 level
vDiffraction versus NumAndShape: the parameters behind the verdict, then further details
ParametervDiffractionNumAndShape
PriceFreeFree
Update frequencyโ€”Every 2 months
AdsNo โ€” betterYes
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS8.0 โ€” better16.6
Further details โ€” not scored
Size32 MB5 MB
Age rating4+4+
DeveloperInstitut Laue-Langevinken morobayashi

In-app purchases

None

vDiffraction

No in-app purchases

6 purchases

NumAndShape

One-time6
  • prime number$0.49
  • power$0.49
  • per hour$0.49
Show 3 more
  • binary number$0.49
  • sin cos tan$0.49
  • NumAndShape Unlimited$1.99

Questions

Is vDiffraction free?
vDiffraction is free to download, with no in-app purchases.
Is NumAndShape free?
NumAndShape is free to download, with in-app purchases available.
Do vDiffraction or NumAndShape have ads?
NumAndShape shows ads; vDiffraction does not.

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