Does the watch app track and analyze my sleep now?

The original Sleep Cycle app on your phone remains the mother app. The watch app assists the Sleep Cycle app on your phone, making sure you can set and reset the alarm from your wrist, waking you up silently in light sleep and feeding heart rate data to the mother app. You still need to place your phone on your bedside table, in order for the sound analysis to work. But you no longer have to reach for the phone to stop and start Sleep Cycle, it’s all right there on your wrist now.

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