There are websites, (previously printed tables) the give the exact coordinates of any given celestial body from any given location on the planet in terms of compass direction and angular altitude ground being 0 straight up being 90 degrees. If I know where Canada is, which is the other side of Lake St. Clair, that’s East. The lake is always east and I have that sense of direction imprinted in my brain so I know instinctively where east is, no matter where I am. Sun rises in Canada, sets in Chicago; always has, always will. Based on that, you can find any point in the sky without a GD ‘app’.