A free app for Android, by ypsilon.takai.
The free app called Talking Countdown Timer L offers you the chance to use a unique countdown timer that can be customized to your exact requirements.
The application was designed with a user-friendly interface that will enable you to use it in an easy and convenient manner.
As you can see in the screenshot, you will have the ability to create your own countdown timer, with the possibility to choose the duration of each button and also to choose the time that the timer will announce.
So, if you want to use this app, all you have to do is to download it from the Google Play Store, and you will be able to use it for your needs.
