It is a Meditation Timer with interval alerts and background music.
It is also a Motivator and Tracker based on Mandala concept, which integrates with Health app and tracks meditations done using any other app as well.
On the Apple Watch app, go to Stats page, scroll down and tap on "Meditations" button. Use the swipe action on the meditation to delete it.
To delete meditation done using other apps, use the Health app on iPhone.