Contact Us

Lay it flat between your mattress and fitted sheet, centered under your upper back — roughly at heart level. This position gives the cleanest heart rate and breathing signal.

No. OZI is completely contact-free. No wristband, ring, or chest strap — just lie down and sleep normally.

No. OZI only uses motion sensors to detect micro-vibrations from your body. There are no cameras, no microphones, and your data is encrypted.

OZI works with most standard mattresses — memory foam, hybrid, innerspring, and latex. As long as it can lie flat between the mattress and your fitted sheet, you're good to go.

First, smooth it back out so it lies completely flat under the sheet. Then unplug the power for about 10 seconds and plug it back in to restart the connection. Your next sleep session will record normally.

No. OZI is a one-time purchase. Sleep tracking, AI coach, smart alarm, family sharing, and all app features are included for life — no recurring fees.

Yes. OZI is designed for continuous nightly use and is powered through a USB cable, so there's nothing to charge or replace.

Yes — as long as the topper is under 4 inches thick. Place the tracker between the mattress and the topper, keeping it flat. Thicker toppers may dampen the signal and reduce reading accuracy.

This usually happens when someone is standing too close to the bed, touches the bed, or causes slight movement nearby. OZI’s sensor is very sensitive, so it may occasionally detect a few seconds of signal. There is no need to worry — this will not affect your normal sleep tracking or sleep report.

OZI generates your sleep data based on when you wake up.