Description

Find out how fast or slow your mechanical watch runs. Wear it on one wrist and your Pebble on the other, and when its seconds hand reaches 12, press SELECT. Regulator times the press against the Pebble's phone-synced clock, asks which minute your watch showed, and keeps the offset.

Over a few days of checks it works out the rate in seconds per day, shows it on a regulator scale with the chronometer tolerance (-4 to +6 s/day) marked, and charts the run like a timegrapher. Two checks at least four hours apart give a first rate, marked provisional until the checks span a day.

"I just set it" starts a new run after you set the watch, and "Undo last check" takes back a slip. Keeps a separate record for up to four watches, named in the app's settings. The checks are kept on the Pebble.

For Pebble Round 2 and Pebble Time 2.