Fitbit's bath smart Scale that has WIFI

Fitbit's bathroom scales have Wifi built in to upload your progress to an online profile.

Weighing in used to be a pretty basic affair: shuffle unwillingly on to a platform like some sort of farm animal and watch a mechanically-powered needle point where it would.

No longer. As part of a gaggle "digital lifestyle" firms, spurred on by the mobile internet boom, Fitbit has turned it into an act that feels more like a step into a future where an array of gadgets will keep constant watch on our health.

At the moment, though, the Fitbit Aria is a set of bathroom scales for the technologically-advanced weight watcher.

The swish, Apple-influenced minimalist design will look good in almost any modern bathroom. I tested the black version which tended to accumulate visible footprints and dust, but a white model is also available. As you'd expect for a gadget you're going to be standing on the scales are pleasingly sturdy, while the blue digital readout is bright and easy to read.

As well as your weight in new or old money, the Fitbit Aria will have a go at calculating your body fat percentage by passing a tiny elecrical current through your bare feet. Without a proper body fat test to compare it to, I have no idea how accurate the scales are in absolute terms, and I found they varied by as much as 2 per cent on any given day depending on the time, what I was wearing, how hydrated I was and presumably other factors.