Big shoutout to @photoephemeris - definitely worth the money.

I’d been planning to get a shot of my hometown's landmark lined up with the sun, taken from a specific spot. Not only could I plan everything from a top-down view, but I could also preview it in 3D with my camera’s actual field of view.

What really impressed me: they even have detailed 3D models of buildings (and landmarks), making it incredibly easy to dial in the composition and line everything up exactly as I wanted.