Traditional cuffs measure a moment.
A cuff inflates around your arm until it briefly stops your blood flow entirely, then slowly releases, listening for the exact points where flow starts, then fully returns. It can't tell the difference between your true resting number and a temporary spike, from stress, from talking, from the moment itself.
Signal Ring listens continuously.
Every time you heart beats, the shape and timing of your pulse shifts depending on your blood pressure. Signal Ring's sensor picks up those changes directly without stopping or interrupting anything. The ring simply reads what your pulse is already telling it.
Realtime tracking
Watch your blood pressure being measured live right before your eyes in ten second increments. See right in the app how different activities can affect your readings.
Zen Mode
Zen Mode lets you take a calm, guided reading whenever you need that reassurance such as before a doctor's visit or just out of curiosity. No cuff. No stress.
Background readings
Your blood pressure moves all day, most of it happening when you'd never think to check. Signal Ring quietly builds the full picture of your day in the background, whether you ever open the app or not.
The full-day picture
Our blood pressure rises and falls constantly in response to everything you do. Background readings build into a mean arterial pressure (MAP) graph, a view of your blood pressure across the whole day that a single cuff reading could never give you.
Your MAP chart
A traditional cuff hands you your two numbers, once, from one moment. Signal Ring plots your pressure across the whole day, so you see how it actually moved, not just where it landed at one snapshot.
That's why you can skip calibration.
Signal Ring’s high speed sensor catches detail other devices miss entirely, and is fast enough to tell your arteries simply shifting apart from your blood pressure actually changing. That's what makes a baseline unnecessary, and what makes calibration a thing of the past.
Why "no cuff" really means no cuff.
Most “cuffless” wearables still hide a cuff somewhere. They read your pulse, but only after a cuff sets a starting point to compare against, which drifts out of date, and has to be reset again (and again) to stay accurate.