With the proliferation of devices like Fitbit, a growing amount of health data is being collected about consumers. The real value of this data, many believe, is its integration with data from other sources into a variety of apps and platforms. This is increasingly being done through the use of APIs, currently being offered consumer device makers such as Fitbit, Withings and Jawbone, as well as by electronic health records like drchrono, Allscripts and Practice Fusion. APIs are also being used in platforms designed to offer an integrated user experience for the variety of digital health apps available. These platforms include Aetna Carepass, Kaiser Permanente’s Interchange and Runkeeper’s Health Graph.