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.
Why not? YOu may have to play with your red dot knob (on/off) to differentiate between teh laser red dot and the dot of your sight, but you will be able to see the boresighter clearly.
I laser boresight zero indoors at 25', so the red dot of the scope would be an inch or 2 low, according to the ballistics table. It might a problem if you are boresight zeroing at 100yrd for a 100yrd zero, but the on/off thing should work I suppose.