Can you trust your scale?
Remember that the scale won't tell you your body composition, or the amount and distribution of fat and lean mass on your body. Thinking about body composition is important because muscle mass weighs more than fat does. That means that when you weigh yourself the scale may show that you've gained a few pounds.
Can a scale become uncalibrated?
Whether you use medical or industrial scales in your workplace, it's important to ensure that they're regularly calibrated. Even a high quality scale will not remain accurate forever. General wear and tear and prolonged use will cause a scale to slowly become inaccurate.
Can a smartphone be used as a scale?
With a few adjustments, it's now even possible to turn your smartphone into a mini set of scales. All you need is a suitable app, a post-it, and a resealable plastic bag ("air cushion") to transform cellphones and tablets into scales. First, download the "Working Scale" app onto your Android device.