Most wellness apps are built around motivation. Temper is built around what the research actually shows. Motivation gets you in. It doesn't get you back.

In one of the largest cold plunging studies ever conducted, 2 in 5 people dropped out within three months — even inside a structured clinical trial. The 3 who stayed weren't tougher. They had something to come back to.

App users stay consistent 3× longer than people using a notebook and twice as long as those using a website. Temper is built around what actually moves that number — streak tracking, behavior logging, and something to come back to before one missed morning becomes a week.

Our goal: 5 out of 5 still plunging on Day 90.