An egg timer is a simple kitchen tool used to measure the cooking time of eggs. It helps ensure that eggs are cooked to the desired level, whether soft-boiled, medium, or hard-boiled. Typically, it is a small, hourglass-shaped device that can be mechanical or digital, with a timer that counts down the minutes. Most egg timers are designed to be easy to use. You set the timer according to how you want your eggs cooked, and it will alert you when the time is up. Some advanced models even change color to indicate the cooking stage of the eggs.