Okay, software is super popular right now, from free Apps to more expensive dedicated programs, so let's test something out.
The Challenge:
Test your software on paper if possible or using a water mark on steel if you nothing else. We want to test this software at a minimum of 800 yards...
Took me a while to find but I found what I think is the best app for iPhone. It is called Strelok Pro. It has a truing option and you can change to the metric system if needed. This is the closest thing I could find to Atragg on the iPhone.