# How does a range session change the number on the course? > Canonical: https://pinflag.io/answers/range-and-simulator/how-does-a-range-session-change-the-number-on-the-course It replaces the benchmark pattern with yours. Before a session the number before the swing runs on a benchmark dispersion labeled Estimated; after it, the same target is priced with your own carries and spread, labeled Measured, and Shot Cloud draws the session’s shots around the target on the hole. Topic: Range, simulator and launch monitor sessions, https://pinflag.io/answers/range-and-simulator ## 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.