To know more about Pomodoro Technique:

http://en.wikipedia.org/wiki/Pomodoro_Technique

The app is FOSS, released under the Apache 2.0 license. You can found the sources at https://github.com/danybony/wear-pomodoro

Instructions

-Pair your device with watch.

-Install the application

-Run the app from your watch with

OK Google... start Tomato

Note:

you will NOT find an icon on your smartphone launcher. The app is installed directly on the watch once it is paired with the phone.