I believe it is a nikon app, I think winchester has one as well. my LGS has an Ipad with the nikon app on it so you can make adjustments while bore sighting.
not precise by any means but gets you close to where you want to be and offers a good start point.
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
I never said half the stuff people said I did-Albert Einstein
You can't believe everything you read on the internet-Benjamin Franklin