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.
This is great thing to have.
Take a look at your groups and this graphic will tell you what is going on and what to correct (it might not be 100% but I know it is true in my case).
Cheers.
http://www.saltzgaber.com/images/correction_chart.PDF
Those charts are intended more for single handed classic bullseye style shooting. They fail on some things with two handed shooting. But the basics are still valid. In particular with the low and left being related to "anticipating".