From The Truth About Guns:

The Range Buddy app is basically a digital book of drills and qualifications that you can do at the range. Having it on my phone makes it extremely convenient to reference while at the range. I don’t want to dig through pistol-training.com to find the right drill when I’m at the range (RIP Todd). The Range Buddy app is an expansive list of drills and a few police quals that seem to be slowly expanding.