Been using Day One since February 2013. In the beginning there was a single Journal where you could put a single Picture and start writing in Markdown. They changed their economic strategy to subscription, added multiple journal, multiple pictures... videos, audio etc. removed markdown features I was using a lot (like footnotes) and the ability to see the markup for easy editing. They're basically EverNote now. They completely lost their original idea and what made Day One such a great journalling app. I wish I could easily switch to another one. I did it once with a more agnostic markdown note-taking app (iA Writer) but ultimately came back to Day One. I even developed one of my own as a PWA...

Day One is a totally different thing now. We don't need another full-featured note-taking app. We need something different and simpler.

SN: I'm also a GTD enthusiast who spent tons of money in apps like OmniFocus or Things or Agenda. I ditched everything to rely only on Reminders and Notes and have never been more efficient.