We're already one month deep into another new year. With the best will in the world, ambitious resolutions often lie discarded, the best laid fitness plans of mice and men ruinously abandoned at the seductive and delicious twin altars of food and booze.

Still, we persevere. It's good to at least keep a watchful eye on the state of our bodies, even if their temple status was regrettably withdrawn some time ago. With a set of smart bathroom scales, such as Renpho's upgraded unit on review here, cold, hard data will be captured, logged and tracked, making it ever trickier for you to keep lying to yourself about the state of you. This - whether you like it or not - is a good thing.

There's obviously a limit to how smart a set of scales can be. They're scales. They weigh stuff. You, mostly.

Where this Renpho scale applies its smarts is with four precision sensors that use bioelectrical impedance analysis (BIA) technology to measure the...