Device vendor Fitbit has raised US$12 million in Series C funding from existing investors Foundry Group, True Ventures, SoftTech VC and Felicis Ventures. Meanwhile Glooko, which manufactures a device for diabetes management, has raised US$3.5 million in Series A funding from a range of investors including Social + Capital Partnership.

According to AllThingsD Fitbit will use the cash “mainly for hiring and aggressive product development” without being specific what new devices are currently on its agenda. Glooko will use its new backing to launch new versions of its solution which interconnects an iPhone and a blood-glucose meter. The two new fundraisings follows a sizeable US$40 million investment round staged last month by rival device vendor Jawbone whose investors include German operator Deutsche Telekom.

Most recently Fitibt announced the Aria (pictured), a Wi-Fi-enabled weight scales which it will launch in late April. The new device was one of many launched at CES by mobile health vendors, reflecting both growing consumer interest but also increased competition between manufacturers of wellness and health devices. Another significant addition has occurred since CES with the launch of the Nike + Fuel Band, a wristband that tracks movement and then uploads data to the Nike + website through Bluetooth or USB. The latter device ups the ante because of the global brand of its creator.