Meet Bettir, the first YC Winter 2015 company to launch. Bettir is an app that lets you record your blood pressure and get daily feedback from experts. 

Chances are you only get your blood pressure checked maybe once or twice a year at the doctor’s office. You sit down in a relaxed setting near the waiting room while a nurse wraps a black velcro unit around your upper arm and pumps away. Perhaps the reading comes out a little high, but nothing to worry about. At least until you find yourself in a high stress situation, your blood pressure spikes and you end up having a stroke.

Going to your doctor twice a year isn’t the ideal way to get an accurate reading, says Bettir CEO Mike Chen. He and his four other co-founders, David Merriman, Ben Godlove, Nic Novak and Michael Rubin, were all friends at Oberlin when they started discussing the idea of going the startup route together. The band formed and through some health research, Bettir was born. It’s now Y Combinator-backed and ready to ship.