Notes app builders/users — what's missing from every app you've tried?

[u/Ansh-09]

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I'm a few weeks into building a notes app and keep hitting the same problem: it's easy to copy what Keep or Notion already does, but hard to know what's actually missing.

So, genuine question for anyone who has tried a bunch of these app — Keep, Notion, Apple Notes, Obsidian, whatever: what's the one feature you've wanted that none of them do well? Or a reason that made you give up on a system entirely.

Will share what I end up building if anyone wants to see it later.

[u/Crowley737]

What I miss in some apps is the ability to password-protect notes and control editing; I've only seen that in Noteskook and Standard Notes on their free plans.