If you want to delete your activities for Private Structure app, you can remove your information by following these steps:

  1. Go to your Facebook Account’s Setting & Privacy. Click Settings.
  2. Look for Apps and Websites and you will see all of the apps and websites you linked with your Facebook.
  3. Search and click Private Structure in the search bar.
  4. Scroll and click Remove.
  5. Congratulations, you have successfully removed your app activities.