# Does PinFlag work without cell signal on the course? > Canonical: https://pinflag.io/answers/predictive-strokes-gained/does-pinflag-work-without-cell-signal-on-the-course Yes. The course maps live on your phone and every shot is stored on the phone as you log it. A dead zone never interrupts a round; the round uploads to your account when the phone next has a connection, and every number is already computed on the phone. Topic: Predictive strokes gained in PinFlag, https://pinflag.io/answers/predictive-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.