Fair Policy but doesn't work – Printer Pro Lite by Readdle Review

Unlike other reviewers here, I think it is a fair policy to run the free lite "check tool" first to see if the app will work BEFORE committing money to the full edition. However it will not work on my otherwise perfectly running network with a Canon Pixma MX410. It did work with an AirPrint capable Dell though.
Review by retroG on Printer Pro Lite by Readdle.