Just a log of “my transition” and what have works well.
I used Google Maps a lot. I have moved to https://mapy.com/ works surprisingly well for navigation and regular map need, not very strong in POI, but that was expected.
Google Analytics swapped for https://dashboard.simpleanalytics.com/ - should have done this way earlier, just an overall better product for my needs.
Exited Goodreads for https://app.thestorygraph.com/ - zero problems
ChatGPT/Gemini moved to https://chat.mistral.ai/ - this one is a slight downgrade on both functionality and results. (so I am still cheating a bit on this one)
Moved to here, PieFed from Reddit - not regrets.
I was using Brave and Duckduckgo/EcoSia from before. I would consider moving away from Brave for a similar private but European browser.
I love citymapper, however it only covers a limited number of urban areas, is UK based and most importantly got bought by Via Transportation in 2023 (US based).
It seems like many city/regional operators have their own apps, this might be an option for you ?
You might also want to have a look at the apps that use transitous.org (listed on their homepage). Amongst them is cartes.app, which is a really exciting open source gmaps alternative wannabe, hosted in France (see cartes.app/roadmap for more technical details). Although it’s still a wip, they’ve made great strides recently and I’ve started using it to replace some of GMaps’ use cases. The only issue is, errrr, there’s no English interface for now :) It’s still a small team, so they’re keeping internationalisation for later.