The Moscow Metro is the most famous underground in the world. If you don't know how to get around, you can download this free app, which has all the information you need to know about the capital's metro. No bells, whistles, or other complications. The map is very simple and easy to use. You can zoom in and out, and that's all. Very simple and easy to use! It opens to the Moscow Metro map immediately so you can quickly decide if you need to hop on the train in front of you or wait for the next one.