A. 1. Update the app: Check the App Store for any available updates for Planimeter Pro. Developers often release updates to fix bugs that cause crashes. 2. Restart the app: Close the app completely and reopen it. This can sometimes resolve temporary issues that lead to crashes when performing specific actions.

B. 3. Avoid removing multiple pins at once: If the app crashes when removing several pins, try removing them one at a time to see if that prevents the crash.