Humana

At the Samsung Developer Conference this week in San Francisco, the South Korean consumer electronics giant revealed much more about its digital health plans, including the names of 24 partners it has been working with -- a dozen commercial partners and a dozen research partners.

As Apple's official launch of iOS 8 -- and with it Apple's Health app and HealthKit developer toolkit, HealthKit is looking more and more like a broad partner play.

Health insurance provider Humana launched a new health app for users of its wellness rewards program, HumanaVitality.