Made to measure all the ways you move.
Apple Watch unites the capabilities of an all-day fitness tracker and a highly advanced sports watch in one device you can wear all the time. It can track a wider variety of activities because it’s able to collect more types of data. It uses an accelerometer to measure your total body movement. It has a custom sensor that can measure intensity by tracking your heart rate. And it uses the GPS and Wi‑Fi in your iPhone to track how far you’ve moved.