4.7 rating · 500,000+ ECGs reviewed

Heart feels off?

Get your ECGs read by certified experts
within minutes, for peace of mind ❤️

Download Qaly ECG Reader from the App StoreDownload Qaly ECG Reader from the Play Store
Dr. Marco PerezStanford

Co-founded by Dr. Marco Perez,Stanford cardiac electrophysiologist

The same ECG reviewed on Qaly: Atrial Bigeminy, with 19 PACs marked
An Apple Watch ECG result reading Inconclusive

Qaly member reviews

★★★★★

Best peace of mind for your ❤️

By MSM713

Qaly gave me back some control letting me know what my weird beats were, stating if they were within a normal range and giving me some much needed information about my heart. Peace of mind obtained.

★★★★★

Life saving

By Cassidyydissac

This app helps me differ when a flutter in my chest is something more serious or just a flutter I don't need to be scared about.

★★★★★

I just need to know

By Yhm023

No waiting for an appointment and hoping the thing you came to check out occurs in the doctor's office.

Available 24/7

What does a cardiac technician see in your ECG?

Every recording is measured in seconds, then read by a certified cardiographic technician. Here is what comes back.

Your intervals, measured

PR, QRS and QTc measured on every recording and flagged when one sits outside the usual range.

A PQRST waveform with its points labelled, beside Qaly's measurements: QTc 460ms and QRS 90ms passing, PR 210ms flagged

Your beats and your rate

Every extra beat marked where it happened, PVC or PAC, with your heart rate and heart rate variability.

A rhythm strip with one beat marked PVC, beside Qaly's readings of 52ms heart rate variability and an 88 BPM average heart rate

Explained by a person

A certified cardiographic technician reads the same recording, confirms the numbers, and writes back in plain words. Their name is on every review.

★★★★★

“I was expecting something automated and got someone who seemed to care.”

By Sierra R
A member asks whether palpitations all day are ok. Jessica, a Qaly technician, replies that the ECG shows sinus arrhythmia at 82 bpm, a common and normal variation, and signs the message by hand

Works with the watch you already own

Nothing new to buy. If your device exports a single-lead ECG, Qaly can read it.

One ECG is a moment. Look for the pattern.

Your heart can change from day to day. Qaly keeps your ECGs and heart measurements together, so you can see how things change over time.

An example

Outside the usual rangePR interval212ms

PR is how long the signal takes to cross your heart, top to bottom. Twelve monthly readings from one member, each unremarkable on its own. Together they show it creeping past the usual range, and that is what a technician caught.

Usual range ends at 200ms

SepAug

Everything else Qaly tracks the same way

For your appointment

Report that your doctor can’t ignore

Ten minutes with a cardiologist is not long enough to describe a year of palpitations. Export any period as a PDF and hand over the whole record instead.

★★★★★

“Next time I showed the Dr the QALY interpretation and they took me seriously.”

By lavender_m00n
Two pages of a Qaly report: findings counted by rhythm with severity, trends for heart rate, QRS, QTc and PR across the period, ectopic burden, and page after page of individual reviewed recordings
“

With the modern availability of at-home devices that can measure ECGs, it is now challenging for cardiologists to keep up with all of these readings. On Qaly, trained ECG technicians read every ECG you submit.  If you want to learn what your ECG may be telling you, this is the place to start.

Dr. Marco Perez

Stanford Associate Professor of Medicine
Stanford Cardiac Electrophysiologist
Co-PI of Apple Heart Study

Qaly Co-Founder

Dr. Marco Perez

Stanford Associate Professor of Medicine
Stanford Cardiac Electrophysiologist
Co-PI of Apple Heart Study

Qaly Co-Founder

Macro Perez - Co-founder of ReadMyECG

Marcie. Judy. Carsten. And thousands more stories.

Don’t take our words for it. These are members who sent an Apple Watch, Fitbit or Kardia ECG when they felt palpitations, saw AFib flagged, or got no answer at all.

Frequently Asked Questions

Who are the experts reading ECGs on the Qaly app?

On the Qaly app, certified cardiographic technicians read your ECG.
‍
Cardiographic technicians are health professionals — like cardiac nurses — who study how to read abnormal heart rhythms from ECGs in hospitals. These cardiographic technicians are trained to identify irregularities like SVT, AFib, PVCs, PACs, Short PR Interval, Inconclusive ECGs, and more.

Now, on the Qaly app, these same technicians read ECGs from your smartwatch or at-home ECG device, 24/7, whenever you need them to.

Most importantly, all cardiographic technicians on Qaly have successfully cleared the CCT exam administered by Cardiovascular Credentialing International, which is considered the gold-standard in heart rhythm analysis credentialing for cardiographic technicians.

What rhythms do experts on the Qaly app look for?
How much does Qaly cost?

You can check out all of our different subscription plans, which include our Annual and Monthly plans.

How is the Qaly app different from other heart monitoring apps?

Qaly is the only app on the App Store and Play Store where certified experts read your ECGs within minutes, for peace of mind.

With Qaly, discover possible new cardiac arrhythmias and palpitations, track known arrhythmias and irregular heartbeats, and unlock deeper insights about your heart health through monitoring from certified cardiographic technician.

By getting your ECGs read by certified experts within minutes on the Qaly app, you get peace of mind while you wait for your doctor's next available appointment. Try Qaly for free today, and cancel any time.

What all can the Qaly app do for me?

• Qaly is the ultimate ECG reader app, built by Stanford cardiologists and engineers: 500,000+ ECGs read. Get your ECGs read within minutes.
• With Qaly, get an ECG reader online for all watches and devices: Apple Watch ECG, Samsung ECG, Fitbit ECG, KardiaMobile ECG, Withings ECG, Wellue ECG, holter monitor ECG, and more.
• Qaly's online ECG reader analyzes Inconclusive Apple Watch ECG, Inconclusive Samsung ECG, Inconclusive Fitbit ECG, Unclassified KardiaMobile ECG, and all other Inconclusive ECGs.
• Qaly's ECG scanner online interprets Low Heart Rate ECGs, High Heart Rate ECGs, and Poor Recording ECGs.
• See if your PR Interval, QRS Interval, and QTc Interval is short, normal, or long with Qaly's online ECG interpretation. Apple Watch, Kardia, Samsung, Fitbit, and Withings.
• Get Qaly's ECG reader online free today, for commonly confused rhythms like PAC vs PJC or PVC vs PAC.
• ECG interpretation app for SVT ECG, Afib ECG, Bigeminy ECG, and more abnormal heart rhythms.
• Get ECG interpretation online for irregular heartbeats and palpitations.
• See irregular heartbeats like PAC, PVC, and PJC from Qaly's ECG analysis online.
• Get more from Qaly's ECG reading app than your typical ECG analyzer app or ECG scanner app: Qaly is the only ECG app where human experts read your ECG within minutes.
• Upload ECG for interpretation from certified experts on the Qaly app, including borderline ECGs.
• Read ECG online with Qaly to identify a VTach ECG or a WPW ECG, then share your Qaly ECG report with your doctor.
‍• Get a quick ECG report check online for weird heartbeats, day or night.
• Join 200,000+ heart heroes seeking how to read an ECG on the Qaly app for an ECG report analysis online free today.
• Get started with Qaly's ECG analysis online free today, cancel any time.

Is Qaly accurate?

Qaly is designed to provide reliable ECG interpretations, especially when your Apple Watch or other device gives a result that feels unclear or inconclusive.
What makes Qaly different is the option to have your ECG reviewed by certified cardiographic technicians, not just software alone. Qaly was co-founded by Dr. Marco Perez, a Stanford cardiac electrophysiologist, to help users get fast, clinically informed feedback on their ECGs.  
‍
Qaly is rated 4.7 stars on the App Store with 875 ratings, and many users say it gave them peace of mind, helped them better understand confusing Apple Watch ECG results, and helped them decide when to follow up with a doctor.

How do you pronounce Qaly?

Qaly is pronounced "Qualee", as in quality-of-life.

Still have a question?

Feel free to reach out at support@qaly.co.

Get your ECGs read by certified experts within minutes, day or night.

Download Qaly ECG Reader from the App StoreDownload Qaly ECG Reader from Google Play
AppleDownload QalyGoogle PlayDownload Qaly

Start today. Cancel anytime.

Join 200,000+ heart heroes signed-up with Qaly

On the Qaly app, send ECGs from your Apple Watch, Samsung Galaxy Watch, Fitbit Sense, Fitbit Charge 5, Withings Move ECG, Withings Scanwatch, Kardia, Wellue, WHOOP, Garmin Watch, or any other ECG device ❤️

★★★★★
App Store - Download Qaly | ECG Reader

Amazing comfort for any one struggling with heart issues.

★★★★★
App Store - Download Qaly | ECG Reader

Best peace of mind for your ❤

★★★★★
Google Play - Download Qaly | ECG Reader

Extremely grateful for the person who reviewed my ECG.

★★★★★
App Store - Download Qaly | ECG Reader

To the pros reading my ECGs, thank you!

★★★★★
Google Play - Download Qaly | ECG Reader

Life changing!

★★★★★
App Store - Download Qaly | ECG Reader

I looked for an app that uses real technicians, and not an algorithm to read my ECGs. Luckily, Qaly was there at the right time for me.