Fitbit sees revenue more than triple Wearable tech**logy company Fitbit saw its revenue beat expectations and more than triple to $400m (£256m) in the second quarter of the year.Margins fell, however, due to higher spending on new products.Net income rose to $17.7m in the quarter from $14.8m in the same period the previous year.It is the first report as a public company for the makers of wristbands and devices that track heart rate, calories, steps and sleep pattern.