Midnight to midnight

Drift

From midnight, resting calories tick away as a negative number. Meals add to it. Movement pulls it lower. At the next midnight, the surplus or deficit is where tomorrow starts.

This is BMR, not a gym-day total. Typical adult range is about 1,200–2,000.

Use 0 to start clean. A negative number starts you already in a deficit.

Samsung Health and Apple Health stay on the phone. A site can’t read them. After you start, you can paste a food list or log meals by hand. Install Drift to your home screen and it opens like an app.