If you have a question that is not covered in the user guide or in the FAQ, please don't hesitate sending an email to email@example.com. Alternatively, you can send a request from the app settings. That is a preferred method of contacting support since there will be anonymous diagnostic information included into the email.
How to Contact Support in macOS
Select "Help" in the menu bar when the app is running. Select "Contact Support" from the menu.
How to Contact Support in iOS
Open the app settings and select "Contact Support".