I actually built something very similar as a UWP app but didn't get as far as you have with the feature set. The "no proprietary formats" thing is the most impo

I actually built something very similar as a UWP app but didn't get as far as you have with the feature set. The "no proprietary formats" thing is the most important to me. All files stored as markdown in a simple file structure makes so much sense. Any other app can read the data. In fact, because we both went that way our apps can now share a note database, minus the tagging stuff. Ill be downloading this to give it a spin.