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.
I have actually started to make my own VIA AutoCAD. Makes it really easy for scope sight in and other uses. Plus it lets me add borders for the info I want.
Always nice to make something that works for yourself.