Knowledge
Knowledge that helps you keep going
This isn’t a blog. Every topic is its own carefully built page – with research, examples and tools you can try right away.
Missed a day? What you really lose – and what only your streak loses
One break resets a streak, not a habit. Mark missed days in a 12-week calendar and see how the streak, activity age and automaticity respond.Read and try itActivity age: measuring consistency, not just streaks
One number of days that a break doesn’t reset. See how Check! calculates it, what moves it up and down, and use the simulator to see where your pace leads.Read and try itHow long does it really take to build a habit?
21 days is a myth. See what the research found and use the simulator to estimate when your habit is likely to become automatic.Read and try it