Joining the CAS Community

To view the CAS Community pages, you will need to confirm you accept our Terms and Conditions. If you do not accept them please click Back in your browser.

To participate in Cloudspotter Groups and to view other Cloud Appreciation Society members, you will need to complete your own Community Profile by uploading profile and header images and confirming details about yourself.

Filter Photos:

You have selected:

Main Cloud Types

Other Clouds

Optical Effects


Cyanometer App

Cyanometer App © Jan-Hendrik von Kuick
Cyanometer App © Jan-Hendrik von Kuick

Cyanometer App

Jan-Hendrik von Kuick (member 8876) was inspired by the Cyanometer – an instrument for measuring the blueness of the sky which was invented by the Genevan physicist and Alpine explorer Horace-Bénédict de Saussure at the end of the 18th century – to create the Cyanometer App. You can see more about it here

1 Comment
  • Cher McGrath avatar

    Cher McGrath

    November 21, 2019at2:48 am

    Cyanometer: Sounds wonderful. I tried to make a paper one, but it’s not very effective. I tried to find this app on my Samsung phone. It appears the app is only available on Apple devices? Disappointed. cheers, Cher McGrath

Post a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.