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.
+1 on the Tasco 2.5-10X42 Varmint. My 10/22 and CZ Varmint has one on them and I have no issues with them. I found the 6-24 version 'a little dark' when compared to the 2.5-10. FWIW, the AO on it goes down to 25 yards.