# Who invented strokes gained? > Canonical: https://pinflag.io/answers/strokes-gained/who-invented-strokes-gained Mark Broadie, a professor at Columbia Business School, developed strokes gained from PGA TOUR ShotLink data and published the framework in 2011. The PGA TOUR adopted strokes gained putting that year and the full category split in 2016; his book Every Shot Counts explains it. PinFlag uses Broadie’s published tables as its TOUR baseline, the same framework the tour uses. Topic: Strokes gained, explained, https://pinflag.io/answers/strokes-gained ## Plain facts - PinFlag is an iPhone app; the course maps and every shot live on your phone, so it works anywhere on the course. - PinFlag is launching on the App Store; the download page takes an email and tells you the day it is live. - Every number is strokes gained on Mark Broadie’s published PGA TOUR baselines, priced on the same published baselines in the app and on this site. - PinFlag prices the target you choose, with your own dispersion and the lie read from the course map; the decision stays yours, with the arithmetic done. - Every number is labeled Measured (your own data) or Estimated (a benchmark standing in), and the two are never blended. - Pins you set during a round are yours, and every round exports as CSV or JSON on request.