by habit

See: pro forma
References in periodicals archive ?
This study compared participants that completed the 42-day "Quit Smoking" program by Habit Changer against participants who used nicotine-replacement therapies or other alternatives to quit or reduce intake of cigarettes.
The Quit Smoking program is a 42-day program by Habit Changer that is a novel cognitive-behavioral therapy aimed at helping participants put an end to their smoking habit.
Each program developed by Habit Changer provides a 42-day challenge that helps participants create daily work plans with easy step-by-step action.
Habit-Bull also finds ways to motivate you either by habits suggestions from other users, which you can give a thump-up to try later or you can simply ignore.