For many timer/countdown apps, it is necessary to update the menu bar text every second. Unfortunately, cron syntax only supports down to minutes (due to only checking for cron tasks every minute on Linux).

However, this app is able to update every second. I am suggesting an expansion to the scheduling functionality for seconds:
Existing:
(0-59) (0-23) (1-31) (1-12) (0-6) (minutes, hours, days, month, weekday)
Suggested:
(0-59) (0-59) (0-23) (1-31) (1-12) (0-6) (seconds, minutes, hours, days, month, weekday)