The Mbientlab iOS SDK by Mbientlab interacts with the API to implement analytic components into wearables. LED, temperature, accelerometer, barometer, and timer are some of the features available as guides on the official site.
Google has made several announcements about APIs recently, including the launch of the Content Experiments API, the launch of the new Cloud SQL API, and the availability of the CalDAV and CardDAV APIs to the public.
Throughout the history of computer platforms, each evolution has brought a reduction in size. With each evolution developers have needed to learn to adapt to the new strengths and limitations. Wearable software platforms have emerged, and with them have come new strengths and limitations.