The HTT is a speculative temporary tattoo, that develops over 21 days, designed to help you acquire a good new habit or get rid of an old bad one.
Mockup of HTT evolving
HTT evolves by measuring the levels of specific substances in one's body.
Each tattoo consists of 21 parts, a new one appearing for every consecutive day you stuck to your goal. How dark the part is depends on how well you kept to your goal during the last 24h. E.g. if you smoked, although you wish to quit smoking, the hue will be lighter than if you hadn't smoked that day.
After the 21 days have passed, the Tattoo will remain visible for another 7 days, to remind you that you have reached your goal.
There are three different models of the HTT; one that helps you quit smoking, another that encourages you to be a vegetarian, and third which motivates you to exercise.
Butterfly - nicotine model
Lion - fitness model
Rabbit - vegetarian model
