# PinFlag vs a GPS rangefinder app like Golfshot or 18Birdies? > Canonical: https://pinflag.io/answers/compare/pinflag-vs-a-gps-rangefinder-app-like-golfshot-or-18birdies A GPS app answers "how far is it". PinFlag answers "what is this shot worth": the strokes gained of the target you are considering, with your lie and your dispersion priced in, plus the distance. Many golfers use both, one for yardage on the wrist and one for the decision in the pocket, and PinFlag is the one that changes the decision. Topic: PinFlag compared, https://pinflag.io/answers/compare ## 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.