TrendCut: Weight Trend Tracker App

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About

The problem I kept hitting: my weight would jump a kilo overnight from salt or water, and every app I tried either showed that jump like it meant something or tried to fix my mood with streaks and badges. So I built TrendCut, an iPhone app that runs a Kalman filter over your weigh-ins and shows the underlying trend. A few things it does differently: - The trend is the headline, not today's number. Spikes are damped, never deleted, and history is never rewritten. - For the first 7 days it tel...