The title pretty much says it all. I've been wanting a "Sunrise alarm" for some time, but have never been able to find a way to do it - at least not a free one. In addition to much experimentation with the built-in alarms, I've tried I think every free app in the store that claims to do this, and literally not a single one has worked (they all fail in various horrendously bad ways).
Is there a free way to set a simple sunrise alarm? Failing that, is there any low-cost (like under $5) app that will actually do this well, and works on iOS 12?