Half a croissant, on a plate, with a sign in front of it saying '50c'
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Rolling average scale.

A scale that accounts for little ups and downs
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The scale will display the average of the last 5 days of weigh-ins rather than just today's weight. Most people go up and down by as much as 5 lbs a day-- this would give a better idea of real weight and weight loss.
futurebird, May 10 2009

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       This would also work well with blood pressure, particularly if it would only display the means rather than individual readings. It'd stop people from getting into a vicious circle with it.
nineteenthly, May 10 2009
  

       +1 Hi fb.
po, May 10 2009
  

       YES YES YES. And hi fb too. BRING IT ON!!! I want one.
blissmiss, May 10 2009
  

       Yes but only in Kilos.
simonj, May 10 2009
  

       So frickin obvious, but so missed out. Brilliant. +
Jinbish, May 10 2009
  

       You were jubilant, until you noticed your half-as-heavy spouse was using the scales too. Twice daily.
loonquawl, May 11 2009
  

       It only works when you get on it barefoot and it scans your toeprints, then stores the weight data separately.
nineteenthly, May 11 2009
  

       - fancy-color-shot of soles, being scanned by laser -   

       there's a plot for CSI in there somewhere. [+]
loonquawl, May 11 2009
  

       For the objection that the scale would only work for one person at a time I say: not so! Use of some simple statistical tools would allow the scale to function for numerous people. Collecting data points over time would allow the machine to determine "out of set" measurements and begin plotting a new set. ^T(M set +-5) Plot which, if you have two people using the scale over time should give you separate plots. More simply the scale could simply look for the measurement set of similar data +-5 of the current measurement, proximity in time for and trend then give an extrapolated result. Finally but not least the scale could use a double fuzzy logic algorithm to learn what manipulation of the measured value resulted, in time, in a decline in the mean measured value given your particular psychology.
WcW, May 11 2009
  

       Or it could just ask you for your name before you stepped on. The intent of this could be masked by having histograms of previous weigh ins or something.   

       I'm not sure a set of scales should basically lie to you about your weight. But bun anyway because it could make weigh ins less stressful.
Bad Jim, May 11 2009
  

       If you have a digital scale, you can cover the ones digit, or certain segments of it, to achieve a similar "rounding" effect.
phundug, May 11 2009
  

       Or cover the ones and tens digit for extra rounding benefit.
bungston, May 11 2009
  

       then the scales should include some fat-sensor and give commentary : 'You lost 5kg of fat in the last year, and 4kg of muscle, inferring from the weight loss relative to your last weighing, you also completely lost your shit.'
loonquawl, May 12 2009
  

      
//I can't believe this isn't already baked.//
  

       I had a scale that did that, though it wasn't an advertised feature. I suspect it was to cover up its lack of repeatability. (If each time you got off and got on again it was a pound or two different, you might lose confidence.)
ldischler, Aug 18 2009
  
      
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