Pretty much everyone uses it in London. I've continued using it in Madrid with great success. It's generally very, very good in the cities where it is available

Pretty much everyone uses it in London. I've continued using it in Madrid with great success. It's generally very, very good in the cities where it is available. This is a Google Maps complement, not a replacement, as Citymapper only does navigation within a city, so you can't plan inter-city travel. Also it's optimized for A -> B navigation, not so much for "city discovery", travel research, or more complex itineraries, for which I keep using Google Maps.