[gumby]

> CICO is hard to maintain. Eventually willpower fails and gradual overeating begins, leading to surprisingly large and abrupt weight regain.

The key difference, for nerd hackers, is the floater/sinker graph and the average. Some apps do this these days, though it seems to be less common than it was a few years ago (e.g. Withings and Apple no longer present their data that way).

So as long as the sinker is below the trend you will lose, at some rate. You don’t have to be starving yourself unless you have a fetish, just stay below the trend line. When you have a spurt of enthusiasm you can drive yourself lower; when you are finding it hard, just try to stay below trend.

It’s a manual form of gamification.