Citymapper

Citymapper is a journey planning service integrating data for all urban modes of transport, from walking and cycling to driving, with an emphasis on public transport. It operates by free mobile app and a desktop website, in competition with Google Maps.

The underlying data is either user-generated, derived from open data (usually GTFS-files provided by transport authorities), or collected by local employed personnel

Citymapper started in London, which it calls "the world’s most historic and iconic public transport city", presumably in reference to the London Underground (the Tube) and the double-decker red bus (the Routemaster). Its second city was New York, and it now covers cities on every inhabited continent except Africa. Its headquarters are in London, on the South Bank, close to City Hall, where the Greater London Authority (which has responsibility for Transport for London) is based.

In September 2017, Citymapper launched a night bus service in the East End of London.

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Wikipedia