Cardiogram is an Apple Watch app that measures your heart rate every five minutes, and uses the data to help you get a better picture of your sleep, stress, fitness, and overall health patterns. You can use it to measure your resting heart rate, daily activity level, and sleep. You can also use it to build and track habits, like sleeping for 7+ hours, meditating, or going on a daily bike ride.
Co-founder: Brandon Ballinger, worked as a Google Software Engineer from 2006–2011. He also worked on the Healthcare.gov rescue team. This is his second startup since leaving Google. He also co-founded Sift Science in 2011, which fights fraud with large-scale machine learning.
Job Opening: Cardiogram is currently looking for a front-end software engineer to join their team in San Francisco. Apply here.