Pact Health is an app turned into a supplementary health plan, rolling out this month at six businesses in Massachusetts. Sign up, log your workouts, and your employer will agree to shoulder a bigger share of your out-of-pocket health care costs.

Pact CEO Yifan Zhang says it’s the first plan with a “smart deductible” to incentivize fitness.   One of the first companies to try it out is HelpScout an online customer support business in Boston. CEO Nick Francis signed onto the plan–though not for economic benefits.  He says he did it in part to encourage healthy habits in his employees.   Ceci Connolly, leader of PriceWaterhouseCoopers’ Health Research Institute,  says the hope is that this kind of technology could bring down healthcare costs–but the evidence isn’t there yet.