Ultrahuman’s Ring Will Check Your Heart Rhythm in 60 Seconds, and That Is Where My Trust Stops

Ultrahuman added an on demand heart rhythm check to the Ring Air and Ring Pro, built with FibriCheck. You open the app when something feels off, stay still for 60 seconds while the ring’s optical sensors read your pulse, and the app returns one of three answers: regular rhythm, possibly irregular, possible atrial fibrillation. It also produces a PDF with the pulse trace to hand to a doctor. The ring already watched for AFib overnight. This is the first time you can ask it yourself.

The check is free for eligible owners, the overnight screening still sits behind a subscription, and the feature is live in 37 markets including the UK, the EU and Australia. The US is not on that list.

Ring or watch is the question everyone asks here, and I do not have a strong answer. If what you want is your heart watched, the two look the same to me from the specs. One sits on a finger, one sits on a wrist, both read light bouncing off blood. Pick whichever you will actually wear for the next five years, because that is the part people get wrong, not the sensor.

Where I stop is the diagnosis. A 60 second reading telling me my rhythm might be irregular is a reason to call a doctor, and nothing else. I would not use it to decide I am fine, which is the failure mode nobody writes about. A clean result on a Tuesday is not a check up.

Credit where it is due: Ultrahuman is not pretending otherwise. The output is a PDF for a cardiologist, not a verdict. The AFib detection on the Ring Air is powered by FibriCheck technology with FDA clearance behind it, although that clearance covers the overnight screening and I could not confirm the same applies to this on demand scan.

So, should you buy a ring for this? Only if you already wanted the ring. Health features are a terrible reason to buy a $350 piece of jewellery you were not going to wear, and a good reason to pick one ring over another once you have decided you want one.