Open Library is one of the main data sources for Bookwyrm’s book data. Bookwyrm is an application in Fediverse that can be used to find and write reviews of books. I wouldn’t see that as a contradiction.

Thank you, yes, I didn’t read carefully enough. But there is hope for Hypatia!

If I understand correctly, Hypatia will continue with a new maintainer and is now in the Izzy repo

Everything is better ;-)

i.e. mailbox.org, posteo.de; there are also protonmail and tuta.com, but they don’t have IMAP

Cryptpad Forms or Framaforms are good for simple surveys. For more complex surveys there is Limesurvey.

In my experience, I can’t see any difference in speed between different launchers. But just try it out, install a few and then delete the ones you don’t like.

The interface design is based on how iOS works, for example to move an icon on your phone long press one of the icons and wait till they all go wiggling and then drag the icon to where you want to have it.

In case you don’t like the interface, you can also simply install a different launcher and set it as the default start app. There really is a lot to choose from: https://android.izzysoft.de/applists/category/named/tools_launcher?lang=en