Wearable Health AI
What your wearable can really tell you
Plain language guides to watch and ring alerts, ECG apps, and which device to buy. Some features are tested and cleared by the FDA. Many are not. These guides sort out which is which.
Start here
Set up your device first
Most watches do not check for AFib until you turn the features on. A few settings can also switch them off without telling you.
01 · When an alert goes off
My watch alerted me
How to set up your watch, what an alert means, and what to bring to your visit.
My watch says I have AFib
What an alert means, how to record a useful ECG, and what happens next.
My watch ECG says inconclusive
Why watch ECG apps say inconclusive or unclassified, and how to record a cleaner strip.
Irregular rhythm notifications, explained
How the background AFib check works, and how it differs from the ECG app and AFib History.
My watch says my heart rate is high or low
What sets off heart rate alerts, when the number is wrong, and what to bring to your visit.
My watch says I may have sleep apnea
How watch sleep apnea alerts work, what they miss, and how sleep apnea is diagnosed.
My watch says I may have high blood pressure
What Apple Watch hypertension alerts mean, what they miss, and how to check with a cuff.
02 · Before you buy
Pick the right one
Buyer's guides for watches, rings, personal ECGs, and blood pressure monitors.
Best smartwatch for catching AFib
Which watches have FDA cleared ECG and AFib alerts, and which fits your phone.
Buyer's guide · Reviewed October 2026Best smart ring for sleep
Which rings have FDA cleared sleep features, which are wellness only, and which skip the subscription.
Buyer's guide · Reviewed October 2026Best home blood pressure monitor
Validated upper arm cuffs, and what watch and ring blood pressure features really do.
Buyer's guide · Reviewed October 2026Best personal ECG without a smartwatch
Pocket ECG devices for recording your rhythm when you feel symptoms.
Buyer's guide · Reviewed October 2026Best wearable for an older parent
Fall detection, emergency calling, and simplicity for an older parent.
Buyer's guide · Reviewed October 2026Best wearable for athletes
Accurate heart rate, AFib checks for endurance athletes, and what to use for palpitations.
Buyer's guide · Reviewed October 2026Best wearable without a screen
Seven screenless bands, and the only two with an FDA cleared heart feature.
Buyer's guide · Reviewed October 202603 · Cleared or wellness
Know what is real
Which features the FDA has cleared, and what the label on the box means.
Which wearable features are FDA cleared
Every cleared heart, blood pressure, sleep apnea, and oxygen feature, with links to the FDA records.
FDA cleared or wellness: what the label means
What cleared, approved, registered, and wellness mean on a wearable, and how to check a claim.
How I choose the wearables I recommend
The seven questions I ask of every watch, ring, and cuff before I recommend it.
Buyer's guide · Reviewed October 2026Why trust these guides
From a heart rhythm doctor, with no affiliate links
A heart rhythm specialist
Written by a cardiologist and electrophysiologist who also advises wearable companies on clinical validation and regulatory strategy.
No affiliate links
No company pays for a spot in these guides. How I choose, and my disclosures.
Checked against FDA records
Every cleared feature links to its FDA record. See the full list.
The newsletter
Wearable Health AI
For clinicians, health tech builders, investors, and regulators. What wearables and AI can measure, what the evidence supports, and where the claims run ahead of the data.