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Imagine you had a baby. You want to track the weight at home, fully aware that it is not official. Most parents weight themselves “P” then take the baby and weight together “P+B” and then calculate baby weight “B”. The math is easy; but tracking is not. Why not allow users to create a profile in which the subtraction feature is there so the baby weight tracking is plotted as a function of time. Wyze app has everything but the subtraction feature. I don’t think the baby-weight tracking feature is in any similar scale in the market. It could be a(nother) great differentiator for the product with comparitively less work needed.