Technology group Fitbug Holdings has reached a deal with US services group Towers Watson & Co and Australian company HealthLogix to develop an online health management product.The product, called HealthVantage, will initially be available to Towers Watson's clients in Asia-Pacific, the London-listed company said.Users will be able to synchronise HealthVantage with their wearable devices and smartphone apps to monitor their nutrition and sleep pattern.Fitbug shares were down 1.54% to 6.40p at 09:05 on Tuesday.