Your Orca account can be deleted by opening the Orca app and go to:
Main Menu > Settings > Account Details
Press Delete Account and confirm account deletion. You may be required to enter your account password, or re-authenticate via Signin with Apple or Signin with Google.
See the screenshot below to find the location of the Delete Account button
All data associated with your account will be deleted. This includes any billing information, past boat trips, and all saved content.