This is the app you need if you want to set a countdown timer in your smartphone.
When the countdown ends an alarm sound will play to warn you that is finished.
Very useful app to cook or to know a moment to do something.
A timer is a specialized type of clock used for measuring specific time intervals. Timers can be categorized into two main types. A timer which counts upwards from zero for measuring elapsed time is often called a stopwatch, while a device which counts down from a specified time interval is more usually called a timer. A simple example of this type is an hourglass. Working method timers have two main groups: Hardware and Software timers.
Most timers give an indication that the time interval that had been set has expired.