We allready had the M-Bahn in 1990. https://en.m.wikipedia.org/wiki/M-Bahn

At this time it would have been new and modern…

Bitwarden keeps a local encrypted copy of the database and only connects to the server for synchronisation.

Yes Wallabag is awesome. I use a selfhosted instance and share articles from my phone or my desktop computer via extension. On my work Computer i just copy the URL and add it to wallabag because i don’t want to install the browser extension on my work computer.

What about locus maps? I did not look into the location sharing but there are many options according to https://docs.locusmap.eu/doku.php?id=manual:user_guide:functions:share. It is a paid App but it is really great. I use it all the time for hiking.

Edit: There is also owntracks (https://owntracks.org/) which loggs your location history. The Website can than be shared with whom you like.