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 tried one and found that I was always playing with my focus as I went through the different magnifications. At 3 power focus would be good but when you went to say 6 it was out of focus and I had to spend a lot of time dicking around with the objective focus, when it got to 9 power it was really bad.