OMRON: The monitor sits on a USB-connected NFC tray to upload data to the web

Omron Healthcare has launched an activity monitor that can be synced with an online dashboard via an NFC 'tray' that plugs into a USB port on a Mac or PC. The aim, Omron says, is to make it easier for wearers to keep track of how many calories they have burned and whether they are currently on target.

"Whether walking, running or simply doing housework, you will know precisely how many calories you need to burn to reach your weekly milestones," the company explains. "Results and progress over time can be tracked with easy, automatic data upload to your personal dashboard at OmronFitness.com."

The Omron Activity Monitor with Weight Loss Tracker costs US$49.99 plus an additional $19.99 for the optional NFC tray.