> commercial purposes

It was a free app with no advertising, so it was not used in a commercial context.

> I'm finding it extremely difficult to have any sympathy

People have sympathy for much worse things - you should perhaps work on your sympathy. Here's something to help you: the person wasn't a business owner for decades and just wanted to help others with similar issues, hence spending dozens of hours of his personal time to build an app to share for free.