There isn't one. You need a separate app for public transport.
I use Öffi, which is incredibly good and integrates well with any mapping app you have installed, but is really only useful in Germany.
Most non-google apps are only locally useful cause nobody can integrate info about all public transport around the world.

[–] Dragonish@lemmy.dbzer0.com 6 points 1 year ago

While not a solution right now, I just want to add that the general transit feed spec aims to solve the data interoperability of different transit systems. The transit system keeps a publicly accessible zip file up to date, and then anyone can pull/parse the schedule/prediction data in a consistent way across transit systems. I know in the us adoption is slow, with vendors prefering to build their own walled gardens and transit agencies lacking the vocabulary or skills to advocate for more open data/tools

[–] Cinnamon3431@lemmy.world 3 points 1 year ago

I used Öffi before too, but Transportr supports more countries and looks nicer imo :)

[–] Blaze@discuss.tchncs.de 3 points 1 year ago (1 children)

On mobile or desktop?

There is https://lemmy.world/post/1022670 that could answer your need

[–] Lime66@lemmy.world 2 points 1 year ago* (last edited 1 year ago) (1 children)

Most of these have no public transport, and osmands is in beta, also I need one on mobile on mobile

[–] dafunkkk@lemmy.world 3 points 1 year ago

I recently moved from osmand to organic maps (now that they add gpx support) and even if it cannot be compared to gmaps it's the most usable and have metro maps in it

[–] Cinnamon3431@lemmy.world 3 points 1 year ago

Transportr if you want detailed departure and arrival times. OrganicMaps for Google Maps replacement, lets you choose to route as pedestrian, via car or public transport (but only shows you one option and no departure times).