Citymapper has more features, some of which Google Maps has actually copied.

They still have some more unique features. I'm not sure which of the following have now made it to Google Maps but here are my favorites:

* Recommendations for routes that involve combining bike sharing with transit. (They call it multimodal labs)

* Commute alerts in case of disruptions.

* Map with all the transit features nearby.

* Shows car sharing options as well (such as Zipcar), in addition to Uber / Lyft of course.

* If you start a "Go" trip you get notifications on which station to get off at. On android it also works great with a smartwatch (full support for Android Wear).

As a user of Transit (an app similar to Citymapper), I find it odd when I see people fumbling with Google/Apple Maps for transit. The first thing I see when I open Transit is all the nearby transit stop and lines available. That alone is enough to make it more valuable that non-transit specific apps when I need information very quickly.

In my city, Google Maps treats all bus, tram, and subway stops as being at the same point, so it can't help you find the correct bus stop (many subway stops have dozens of connecting bus lines distributed around all exits of the station). Even when it doesn't make you miss the last connection home, it sucks spending ten minutes looking for the right bus stop.

This is the fault of the data provided by the transport companym and even their own app gets it wrong iirc, but somehow CM has gathered the necessary data and even knows which end of the subway train to get on to get to the right exit to find the right bus stop.

* Trip pricing (although Google also has it in some regions) * Offline static maps for your city * Step free and "avoiding rain" routes