Track whether sleeping on side or back

Hi, thank you for such a wonderful app. It works really well!

I was wondering if it was feasible using a wearable for tracking whether the sleeper is on their back or side and when that changes during the night? For people with sleep apnea, the difference between sleeping on your side and your back can be huge. It would be good to correlate drops in SP02 with changes in sleep position.

Thanks!

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