I have been using this app for years. It has save me days worth of work, trying to figure out when and where the sun will be.. the real world of you along with the sun charts allows you to know what time and where to be to put the sun behind a tree a building whatever your environment. Specifically for things like sunrise that you can’t see the trajectory of the sun until it’s already up, knowing the precise place where it will be coming from is an invaluable tool.
I have recommended this app to anybody who is an environmental photographer even if it is not your main thing having access to this information, will save you an immense amount of time, just get it, seriously.