Countdown
A watch function or complication known as Countdown, adding information or capability beyond basic time display.
Also known as: Countdown timer, Timer
Definition
A countdown function measures time remaining until a preset interval reaches zero, the reverse perspective of a stopwatch counting upward from zero. Watches implement countdowns in several ways: digital timers, rotating bezels used to mark a future point, or dedicated mechanical countdown complications. Some add an audible or visual alert when the interval expires.
Why it matters
Countdown timing is useful for cooking, exercise, sailing starts and other tasks where the remaining time matters more than elapsed time.