Simplenote is yet another cross platform note-taking app and I'm ready to say I like this one. For years I've used the Apple Notes app as my primary place for notes but I spend a good chunk of time on Windows these days. The browser-based iCloud version of Notes is fine but their login process is a complicated pain. The time from need-to-take-note to getting logged in at iCloud was too much. To fix that I've tried a bunch of note-taking options like Bear, Notion, Evernote, Google Keep, Microsoft's OneNote and who knows how many others. Simplenote works well with no cruft. It's made by Automattic
—the company behind WordPress—so I'm hoping that means they'll be offering this for the forseeable future.
Nelson let me know that Simplenote does not store notes encrypted on their servers. It does encrypt the notes in transit
between your devices and their servers, but that doesn't provide a spectacular level of security. He recommended I take a look at Standard Notes
which does store them securely. And be sure to look at Nelson's summary of Standard Notes