Folks,
For some time I could picture an implementation of the spaced-repetition strategy for reviewing my notes, but I couldn't find a procedure or app that did just what I wanted.
The main short-coming of any system of tags or setting reminders is the manual input required to increment the review time. It would be too easy to miss a note or lose one along the way. Likewise, I found ToC notes to be really cumbersome. Anything that required me to export my notes (e.g. to Anki) would be too many extra steps, and I would lose the ability to annotate while I was reviewing.
My breakt