The Rotation. Watch Collection

Measure a mechanical watch's accuracy with the iPhone's microphone, keep your collection on record, and log what you wear. The Rotation keeps one accurate record of a watch collection: references, serial numbers, photographs, what was paid, what it is worth, when it was serviced, and every day it spent on the wrist. The record a claim or an executor asks for, kept properly, and kept to yourself. THE REGISTER File a watch from its photograph or by hand. Serial numbers stay in the register and never appear on a card. A daily wear log answers the question a collection quietly asks — what actually gets worn, and what has not left the drawer since spring. A wishlist keeps the watches you are hunting, in your order, with money put by towards the next. THE TIMEGRAPHER The phone's microphone is an instrument. Hold a mechanical watch to it and the app reads its rate in seconds a day, its beat…