While you are on the site, in your browser find and click "Add to Home Screen" A CGN beaver app icon will then be created to your phone that is directly link to the site.
Note: This feature may not be available in some browsers.
Dennis - Amazon.ca offers the 6-24 for the high 4's today ( I just bought one for a build I am playing with ) and the 8-32 was only a bit more when both were in production.