Google today released a preview SDK of Google Fit available to developers. The tool provides APIs for apps and device manufacturers to store and access activity data from fitness apps and sensors on Android and other devices (like wearables, heart rate monitors or connected scales).

Google warns that the preview release contains the Google Fit APIs for Android, but does not contain the REST API or the Android Wear APIs, which will be included in the official release. Furthermore, while it will let you develop and test fitness apps, they cannot be published to Google Play until official release.

By releasing the preview SDK, Google is asking developers to see what they can do with a userís fitness history, such as personalized coaching, better insights, fitness recommendations, and so on. It is broken down into three sets of APIs.

At its I/O conference in June, Google announced Google Fit and described it as an open platform designed to help people keep track of their fitness goals. Google Fit is slated for official release this Fall.
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