Big Kitchen Timer app

☆ Set the timer

Example: If you sound the alarm after 5 minutes and 10 seconds

Make sure that the screen display is set to "00:00".
If you do not see "00:00", Tap the "Reset" button to set "00:00".
Tap 5 times the "minute" button. (Or, you can increase the amount by continuing to press.)
Tap the "Second" button 10 times. (Or, you can increase the seconds by pressing and holding.)

This completes the timer set.

☆ Start the timer

Make sure that the timer is set on the screen.
Countdown starts when you tap once on the "Start / Stop" button.
The alarm sounds when the screen display sets to "00:00". (Alarm will continue to sound for about 30 seconds.)
If you want to stop the alarm while it sounds,Tap the "Start / Stop" button once.

☆ Cancel the timer setting

Make sure that the timer is set on the screen.
Tap the "Reset" button once. Screen display shows "00:00".
Timer setting has been canceled. (Timer has been reset)

☆ Stop the timer during the countdown

Tap the "Start / Stop" button while the timer is counting down. If you want to resume the countdown, Tap the "Start / Stop" one more time.

If you can't pay, here's the free version.
https://play.google.com/store/apps/details?id=air.net.toyly.kitchentimer