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.
They were imported by (Ronin), a CGN dealer who operates the website tacshot.ca
However, it is "temporarily closed down". It seems to be because of a legal battle with another american company name Tacshot.