Google Fit

Google makes the Google Fit Preview SDK available for developers

A single set of APIs makes it easier to store and access activity data from fitness apps and sensors on Android and other devices.
Jawbone unveils the UP platform

Jawbone unveils the UP platform; Open API coming soon

The UP app 2.5 for iOS enables users to integrate with IFTTT, LoseIt!, Maxwell Health, MapMyFitness, MyFitnessPal, Notch, RunKeeper, Sleepio, Wello and Withings.