15 topics
Complications
Anything a watch does beyond showing the time is a complication. Some are conveniences, some are feats of engineering, and they move value in very different directions.
Date
The most common complication — the day of the month.
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Chronograph
A stopwatch built into the watch.
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GMT / Dual Time
Tracks a second (or more) time zone at a glance.
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Moonphase
A little window that follows the lunar cycle.
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Tachymeter
A bezel scale that converts elapsed time into speed.
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Power Reserve Indicator
A fuel gauge for the mainspring.
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Perpetual Calendar
Knows the date, month, and leap years — until 2100.
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Tourbillon
A rotating cage that averages out gravity's error.
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World Time
All 24 time zones readable at once.
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Annual Calendar
Knows every month length except February.
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Alarm
A mechanical buzzer on your wrist.
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Minute Repeater
Chimes the time on demand, to the minute.
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Small Seconds
A seconds hand on its own sub-dial.
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Jumping Hour
The hour snaps into a window instead of sweeping.
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Split-Seconds (Rattrapante)
Times two events at once with stacked seconds hands.
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Keep exploring
Every topic here is bundled offline inside Watch ID