This is the stuff competitive shooters actually use. Not a list scraped from Google or padded with affiliate links—these are the apps, forums, books, and tools that show up in range bags and browser bookmarks across the competition circuit.

Whether you’re deep into USPSA, just getting started with 3-Gun, grinding PRS matches, or exploring the Tactical Games, this page has something useful for you. I update it regularly as new tools emerge and old ones fade. If you think something’s missing, let us know.