Timegrapher is an app for tracking your watch collection, synchronizing to precise time, and keeping track of accuracy.

Save information on each watch in your collection including details on movement type, case size, band width, purchase price, and more.

Capture precise data points in order to keep a running log of each watch's accuracy. Simply take two measurements at least twelve hours apart and Timegrapher takes care of the calculations for you to get the seconds/day accuracy. Log history is maintained for as long as you want to keep it.