To delete an app navigate to the “Your apps” tab on the Dashboard and click on the app you want to delete.
When you are on your selected app screen click “App settings” on the right hand side of the app menu.
Click “Delete this app” to delete your selected app - but be warned, once you delete an app it cannot be retrieved.
If you would rather transfer ownership of the app to another member of your team click "Collaborators" in the app menu (next to "App settings") and enter the email address of the person you wish to have access.
Once they have access to the app click “Transfer app” in the “Actions” column to transfer ownership to them.