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.
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You could try using a sighting system that allows for adjustment for distance. Dial in an mark your zeros for each range, and aim for the wris####ch all the time.
For shooting these matches 35m down to 10m, I zero at 25m and hold center all the way through, both rifle (16" AR with aimpoint pro) and pistol.
The 5-ring on a figure 11 is almost 4" tall and on the figure 14 it's similar. No need to touch your sights or think about where you are going to hold.