Pedometer

Live step count and step history from the device pedometer

One.Pedometer counts steps on iOS and Android. It has isAvailable(), watchStepCount(fn), getStepCount(start, end), getPermissions(), and requestPermissions().

import { One } from 'one'

if (One.Pedometer.isAvailable()) {
  const subscription = One.Pedometer.watchStepCount(({ steps }) => {
    console.log(steps)
  })
  // later: subscription.remove()
}

const week = await One.Pedometer.getStepCount(
  new Date(Date.now() - 7 * 86400_000),
  new Date()
)

isAvailable() is synchronous. watchStepCount reports { steps } since the watch started; the first event anchors the watch at 0. getStepCount queries the iOS seven-day history and resolves { steps }; on Android step history is unavailable and it rejects with E_PEDOMETER_STEP_COUNT. Permissions resolve { status, granted, canAskAgain } with status of 'granted', 'denied', or 'undetermined'.

Step counting needs the motion permission: set native.app.pedometer.usage, which stamps the iOS motion usage description and the Android activity-recognition permission. The iOS usage description also gates the Barometer. On web, browsers expose no pedometer API, so the sensor reads unavailable, watches never fire, history rejects, and permissions read denied.