I’m not a “Quantified Self” adherent, and I’m not interested in graphs or an elaborate dashboard for my habits. But the mechanism I’ve described is complicated enough that a tool really helps implementation. I really only need a small piece of software to tell me “hey! you need to do X habit today!”—and to hold me accountable if I don’t. Occasionally I want to ask a hypothetical like “if I don’t do it today, what would that force the next few days to look like?”