First of all, Happy Thanksgiving to all of you.

For those of you that use the Watch Tracker app, how does the app actually determine how fast or slow your watch is running without putting it on a regulator machine. All you do is hold your watch close to your phone, with the app running, and I tells you how fast or slow the watch is running. I know its not the best description but those that use the app will understand.

Good day,
Ken