In its essence, Solar Walk is an education app telling you about spacetime, with close-ups of planets, their trajectories mapped and their stories told.
Solar Walk has a free and paid version, but the free one is more like a demo - it shows you one planet with its satellites, but not much more. In the paid app, you get to see the whole Solar system, and as you stroll around our corner of the universe (or multiverse?), each planet is aligned correctly to the Sun, in accordance to the current time and date. Plus, you can even specify a time in the past or future, and use the app as a time machine, seeing what the world looked like then.
All in all, if the one weekly episode of the Cosmos TV series with Neil deGrasse Tyson and his ship of imagination is not enough, Solar Walk is an excellent companion to your virtual space explorations.