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Lifesum is a diet App in Sweden that allows users an occasional “cheat meal” — something like pizza or a burger — without disrupting their progress.

So popular was this product tweak that take-up almost doubled.

That’s what habit specialist Samuel Salzer shared in his talk “The Science Behind Habit-Forming Tech, explaining that designing for “failure states” can improve user and business outcomes. 

From streak to bleak

We know that ...