This is an app for Fitbit OS which you can use during a badminton match to count the score.
To build this app yourself, you have to own a Fitbit Ionic and visit this website: https://studio.fitbit.com/
To download the clockface directly follow this link on your smartphone: https://gam.fitbit.com/gallery/app/76fcd8cd-00dc-4ea6-b09c-8d7a5280611e