Easy cross-linking notes and the ability to categorize with tags are essential to note taking apps. A fast and powerful search is as much important. If the note taking app can be turned into a Zettelkasten system, then you definitely should have a more detailed look at the app. https://passfindr.com does exactly this. Passfindr also lets one encrypt user generated content so it can be used as a password/secrets store as well. It needs to work on every internet enabled platform and devices. So your choice must be the best maintained application: the web browser. As an everyday user for my micro documents, articles, secrets and all kind of resources and ideas, I'm definitely not tired of Passfindr.