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 plan on keeping a 3-9X on mine (when I get it). If I change it to a long rang rig or more accuracy orientated then I'll go higher (Barrel change). I would suggest checking out the Burris E1 compared to the Viper. You might be surprised.