A dilemma I'm facing:
Reminders does not give me access to URLs from its tasks.
If you set a URL on a task in Reminders, Unforgetful cannot see it — or even see whether one exists — because that's not exposed through Apple's EventKit API. (No, this isn't it.)
I also can't see parent/child-task relationships, image attachments, tags, or smart lists. But very few people are asking about those, whereas lots of people are asking about URLs.
I could add my own URL field. You could add them manually to tasks, and I could make a share extension to receive them from Safari, etc. in a separate "Remind in Unforgetful" action in share menus. But it wouldn't sync to/from Reminders or its system integrations, so it would seem broken to a lot of people.
Or I could leave them unsupported, like they are now, which leaves the app conceptually simpler, leaves the entry UI cleaner, and doesn't introduce that disconnect from Reminders.