Citymapper is described as 'Real-time departures. Transit maps. Line status and real-time disruption alerts. Uber integration. Bike routing and live bike share info. Constant updates. Everything you need -- and may not even realize you need -- to manage your life in the city' and is a GPS Navigation Service in the Travel & Location category. There are more than 25 alternatives to Citymapper for a variety of platforms, including iPhone, Android, Online / Web-based, iPad and Android Tablet. The best alternative is Google Maps, which is free. Other great apps like Citymapper are OsmAnd (Freemium, Open Source), Organic Maps (Free, Open Source), Apple Maps (Free) and Transportr (Free, Open Source).
Google Maps is a basic web mapping service application and technology provided by Google. It offers street maps, a route planner for traveling by foot, car, or public transport and an urban business locator for numerous countries around the world.
Transportr is the public transport companion that respects your privacy and your freedom. Transportr is a non-profit app developed by people around the world to make using public transport as easy as possible wherever you are.
Never miss your bus again. Open up the app and boom: upcoming departure times for all nearby transit lines are right there, displayed in big text and bright colors. Plan your trip, set reminders, and get notified about disruptions. Or maybe public transport isn't cooperating?
Find your way in the World with Arcane Maps. Get navigation, traffic, and extended places info and even organize your favorite places into custom lists and share them with your friends. No logs with full privacy.
Wikiroutes - public transportation database edited by the community. You can find information about certain routes, optimal routes between A and B in more than 1650 cities worldwide. Also have mobile clients.