"Neglecting to get on the scale causes weight gain. "

This shows the effectiveness of the "recording diet," also described here.

The time to gain weight is when you are away from your daily routine.

Especially during the holidays, if you are away from home and in an unusual environment, the weight gain effect is already outstanding.

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We do not have scales in our travel destinations, or if we do have scales, we either do not use them or they are useless to us.

This is because different scales in different locations cannot be calibrated (deviation compensation).

I know from experience that "scales in tourist areas are set "loose" (they show a lighter weight).

Because, in a tourist attraction, tourists need to eat a lot of food in a pleasant way so that the customers can drop money.

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To get around the calibration problem, you could take your home scale on your trip, but no one would do that.

Then we can develop a "mobile weight scale," a scale that can be carried around.

The weight can be measured with one foot, so a one-foot size is sufficient.

I just did a quick check, and there are no cell phone-sized scales.

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Or rather,

"Weigh yourself with your cell phone"

It would be good if we could.

Future smartphones should be designed with the concept of "LCDs won't crack" and "won't break even if an elephant steps on it.

Pencil cases and glasses could do it. There is nothing that a smartphone can't do.

This field has been a strength of the industrial products of Japan.