Alternative Apps(tores): Living without Google (FP1)

[tphysm]

@Juulll

However, there are a few apps that I use that I would like to keep and that don’t have an alternative (such as facebook, facebook messenger, instagram, banking apps, public transport apps, telecom provider app, etc.).

There’s a facebook alternative (actually there are several) that is open-source and reduces the tracking by FB. It also covers FB messaging.
Moreover, you can also find the open-source public transport app Transportr on F-Droid, though you’ll have to find out by yourself whether your city is supported by this app.
Hope, this helps.