Stroll is a mobile health application that facilitates patient-physician shared decision making. We surface optimal cost and location information for routine treatments, and we do this right in the doctor's office. This allows patients to take an active role in lowering their own healthcare costs by showing exact personalized pricing with the comfort and support of their care team on hand. By guiding patients to a treatment facility and closing the loop, physicians and providers realize higher adherence, fewer hassles with insurance pre-approvals, and greater patient satisfaction. When patients choose low cost options, payers save big, and by simplifying the conversation around treatment options and cost, patients and physicians more easily build trust and lasting relationships. This results in fewer hospital visits, better health outcomes, and drastically decreased health care spend across the board.