Coming soon to Android and iOS

A calorie budget that learns what you actually burn.

Food logs run low and watches guess high. hachibu compares the two against the one number that doesn't lie, your weight trend, and corrects your daily budget every week.

The Today screen: energy budget, protein floor and the day's log

Snap, weigh, done

Photograph the plate, put it on the scale and add a sentence. hachibu works out what's in it and looks up the nutrition, so the same meal logs the same number every time.

Calibrated, not estimated

Over a rolling window, your logged intake and weight change reveal your true expenditure. That correction absorbs both your watch's bias and your own logging habits.

Built for training

The target moves with the day. Run, ride or lift and the budget makes room to fuel it, with a protein floor that helps you keep the muscle while the fat goes.

Your calibrated metabolism compared with what the watch reports — Your real burn, not the watch's guess

Four weeks of days against the budget and the protein floor — Four weeks at a glance

Weekly deficit and smoothed weight trend — The trend, not the noise

Why "hachibu"?

From hara hachi bun me, the Okinawan practice of eating until you are 80% full. Not a crash diet. A modest, steady deficit you can keep while you keep training.