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Open source android notes app
(lemmy.world)
Lemmy community for degoogling.
Google is evil and there are alternative services you can use which respect your privacy, which are more censorship resistant and can even be more secure.
For a local device note app I will recommend Omni Notes. Its available on F-Droid. Omni Notes support tagging.
For a note app that can be synced to many cloud providers or by using Syncthing is Joplin. It also works as a local device note app too. Supports notebooks which act as categories/folders and tagging and has E2EE for sycning notes.
https://f-droid.org/en/packages/it.feio.android.omninotes.foss/
https://joplinapp.org/
Joplin +1