[i67vw3]

I use reddit unironically and few websites. The applications I use daily have few considerations, mainly privacy, security etc. I get my recommendations from https://www.privacytools.io https://www.privacyguides.org https://www.reclaimthenet.org https://www.restoreprivacy.com and a few other similar sites. Subreddits like https://www.teddit.net/r/privacytoolsio and https://teddit.net/r/privacyguides/ are helpful.

If I need a note-taking app, I visit the above sites. IIRC Standard Notes, Joplin, Simple Notes (by simple tools) are recommended.

If I require a basic application like PDF viewing, for which you may not get recommendations from websites, I go to above subreddits and simple search PDF viewer. Users would have discussed in detail about such an application, along with their pros and cons.

[nttl]

Thank you for the links. I will check it out. About the note-taking app, I want to be able to create notes but in the Question/Answer format. The reason for this is I want to review the questions from time to time and see if I can still answer them, so the answer part needs to be somehow collapsed. It is kind of a flashcard, but with multiple related questions and quite complex information.

[leothexxx]

You should check out SQ3R http://sq3rmethod.com/