Using an Apple Watch:

If you are wearing an Apple Watch during sleep, then Pillow should not be affected by the movements of your partner.

Using an iPhone/iPad:

If you are tracking your sleep by placing your iPhone/iPad on the mattress, we recommend placing the device on your side of the mattress instead of placing it between you and your partner. If the device is placed in such manner, Pillow should register little to no other movements aside from the ones coming from you.