Questions & answers

Yes. The app is free and works with your smartphone or your watch — Apple Watch, Garmin, Samsung, Polar. A WITU device adds high-precision ECG wellness insights.

iOS (iPhone) and Android. Sign up with your phone number; onboarding takes a couple of minutes.

Take a photo of the form or upload a PDF/DOCX from your computer via a pairing code. The AI recognizes biomarkers in ~30 seconds.

No. WITU is a wellness device, not a medical device. Insights are provided for general wellness and informational purposes only and do not diagnose, treat, or replace professional medical advice.

Up to 7 days with active use. A full charge takes about 90 minutes on the magnetic pad.

Yes, it has IP68 protection — you can wash your hands, and exposure to water and dust will not damage the device.

Touch the butterfly clasp with a finger from your other hand for 30 seconds — this closes the electrical circuit and records a single-lead ECG for wellness insights.

Order a free sizing kit and wear a sizing ring for 2–3 days — your finger changes volume over the course of a day.

Yes, the ring is water-resistant. There's no need to take it off for water.

Up to 14 days continuously. The electronic module comes off for charging and moves onto a fresh adhesive.

Yes, the patch is water-resistant and stays on through sweating.

All major credit and debit cards through our secure, encrypted checkout. Your payment details are protected end to end.

Now shipping across the United States — tracked delivery in 5–7 business days. Expedited delivery is available for luxury items.

Yes. For orders from $500, a 0% installment plan over 6–12 months is available at checkout.

Heart rate from the camera or your watch, steps, basic sleep, a basic DCI index and 7 days of history — free forever.

No. ECG, HRV, heart rate and sleep work without a subscription. A subscription adds AI recommendations and lab-result analysis, but it isn't required.

In one click in the app settings or on the billing page. Access stays active until the end of the paid period.

24 months on WITU devices. The warranty covers manufacturing defects.

An item in proper condition can be returned within 14 days. Fill out the form on the support page — we'll send you the instructions.

Data Confidence Index — a data reliability index: sensor accuracy (40%) + blood tests (30%) + length of monitoring (30%). The higher it is, the more precise the recommendations.

An ECG reads the heart's electrical signal through electrodes; PPG estimates heart rate from reflected light and loses up to 30–40% accuracy during movement. For wellness insights, the electrical signal is far more precise.

Heart rate variability — the variation in the intervals between beats. High HRV usually points to good recovery; low HRV often reflects stress or overtraining.