As seen in the number of movement-tracking devices around people's wrists, fitness is big these days. It's also big business, with big companies making big investments in the space. One of those companies is Apple, whose HealthKit received a significant amount of attention at the Apple
The non-profit built for "opening America's government" has created an app to show off its Congressional data, as well as its API (our Sunlight Labs API profile). You can't get this app on the web, though, as it's available exclusively for the Android phone platform.