Jawbone

Ever since Apple announced its HealthKit developer toolkit, which aggregates data from a number of different self-tracking apps and devices, it's been a foregone conclusion that Fitbit would be connected.

When it comes to companion apps for connected devices, Fitbit's is the most downloaded in the health and fitness category and the second most downloaded overall.

Weight Watchers announced that its app will now sync with activity trackers Jawbone and Fitbit so that users of the diet and food logging program can see how their fitness data correlates with their nutrition data.

As Apple gets ready for its long-awaited wearable device announcement later today, a couple of other wearables in the fitness tracking space are following the Apple model of vaguely hinting about upcoming releases.

Physicians Interactive (PI), the digital health marketing company that offers medical reference apps and resources like Skyscape and Omnio to physicians, has acquired one of the oldest, online consumer health brands, MedHelp, for an undisclosed sum.

Activity tracker shipments reached 2.

Pasadena, California-based Stir, maker of the Stir Kinetic Desk, has announced integration with Fitbit's devices that have display screens -- the Fitbit Flex, Fitbit One and Fitbit Zip.

This year has proven to be an eventful one for fitness wearables-maker Jawbone, which for the past few weeks has been the subject of acquisition rumors, according to a number of sources.

In the first quarter of 2014, Fitbit held the majority of the market share, according to a report from Canalys.