Comparison

ECG vs Qaly | ECG Reader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ECG

This app allows users to take an electrocardiogram (ECG) using an Apple Watch Series 4 or later. It checks for signs of atrial fibrillation (AFib) or sinus rhythm and saves results to the Health app for sharing with a doctor.

Highlights
  • Take single-lead ECG readings
  • Detect signs of atrial fibrillation (AFib)
  • Check for normal sinus rhythm
  • Record symptoms alongside ECG
  • Export ECG data as PDF
  • Share results with healthcare providers
Read full description

ECG With the ECG app on Apple Watch Series 4 or later*, you can take an ECG similar to a single-lead electrocardiogram. The ECG app can record your heartbeat and rhythm using the electrical heart sensor on Apple Watch and then check for signs of atrial fibrillation (AFib), a form of irregular rhythm. Features • Allows you to take an ECG similar to a single-lead electrocardiogram. • Take an ECG at any time, when you’re feeling symptoms such as a rapid or skipped heartbeat, or when you receive an irregular rhythm notification. • The ECG app can indicate whether your heart rhythm shows signs of atrial fibrillation—a serious form of irregular heart rhythm—or sinus rhythm, which means your heart is beating in a normal pattern. • Saves ECG waveform, classification and any noted symptoms in a PDF on the Health app on iPhone to share with your doctor. *Not available in all regions. ECG app is not supported by Apple Watch SE.

About

Qaly | ECG Reader

Get your ECGs analyzed by certified experts within minutes for peace of mind. This app supports various devices like Apple Watch and Fitbit, offering detailed interpretations of palpitations and abnormal heart rhythms. Track heart rate variability to monitor stress and recovery.

Highlights
  • Expert ECG interpretation
  • Supports Apple Watch, Fitbit, Kardia, and more
  • Analysis of 30+ heart rhythms
  • Heart rate variability (HRV) tracking
  • Shareable reports for doctors
  • Integration with Health app
Features
Read full description

Heart feels off? Inconclusive ECG? Get your ECGs read by certified experts within minutes, for peace of mind. 500,000+ ECGs read so far. Qaly is the leading ECG app for Apple Watch, Fitbit, Kardia, and other devices. On the Qaly app, get your ECGs reviewed by certified cardiographic technicians, trained to read ECGs for 30+ palpitations and abnormal heart rhythms like Afib, SVT, PVC, PAC, short or prolonged PR interval, short or long QT interval, WPW, and more. Track your heart rate variability (HRV) to monitor stress and recovery. The Qaly app (formerly ReadMyECG) is built by Stanford cardiologists and engineers, including Dr. Marco Perez, a Stanford Associate Professor of Medicine and Stanford Cardiac Electrophysiologist. Join 200K+ heart heroes signed-up with the Qaly app today, the only app where human experts analyze and interpret ECGs from your Apple Watch, Fitbit Watch, Withings Watch, KardiaMobile, WHOOP, Garmin or any other device within minutes, day or night. ---- Qaly members stay heart healthy: “I would like to thank everyone reading the ECGs on Qaly. Because of Qaly, I went to my doctor and was diagnosed with SVT and was told it was probably never an anxiety disorder. I have lived 15 years of hell thinking I was having intermittent panic attacks and agoraphobia. Getting set up for an ablation. I will be forever grateful.” — Marcie D. from Alabama “Qaly was so helpful in quickly identifying signs of a potentially serious heart condition … Without Qaly, I would have blown off the ECG and maybe shown it to my primary care doctor at my next appointment a few months away.” — Lori B. from Virginia “My Apple Watch categorizes my arrhythmia as normal or inconclusive, which makes me question what I’m feeling. Without Qaly, it would’ve taken me another 6 months to a year to take this to a doctor. With Qaly I gained valuable information. Qaly is the key.” — Jessi I. from Washington ----- Qaly members get peace of mind: • ECG analyzer for all watches and devices: Apple Watch ECG, Fitbit ECG, Kardia ECG, Wellue ECG, Withings ECG, WHOOP ECG, Garmin ECG, holter monitors, and more. • Borderline ECG, Inconclusive Apple Watch ECG, Inconclusive Fitbit ECG, Unclassified KardiaMobile EKG, WHOOP ECG, Garmin ECG, and all other Inconclusive ECGs analyzed within minutes, for clarity. • See irregular heartbeats like PAC and PVC on your ECG, analyzed by an expert ECG reader. • See your PR Interval, QRS Interval, and QTc Interval on your ECG, also analyzed by an expert EKG reader. • Get more from Qaly technician interpretations than your typical ECG analyzer app or HRV tracker: Qaly is the only ECG interpretation app where human experts provide professional analysis of your heart readings within minutes. • Share Qaly reports with your doctor, cardiologist, or electrophysiologist. ---- The Qaly app displays ECG data by integrating with the Health app. This is not available on the iPad. Disclaimer: Qaly does not practice medicine or provide medical services. The Qaly application and service is only for general informational and educational purposes and is in no way intended to, or be relied upon to replace or constitute professional medical care or attention by a qualified healthcare provider. The information about health provided by the Qaly application and service is not intended to diagnose, treat, cure or prevent disease. IF YOU THINK YOU HAVE A MEDICAL EMERGENCY, CALL YOUR DOCTOR OR 911 IMMEDIATELY. DO NOT RELY ON ELECTRONIC COMMUNICATIONS OR COMMUNICATION THROUGH THE QALY APPLICATION FOR IMMEDIATE, URGENT MEDICAL NEEDS. THE COMPANY SERVICE IS NOT DESIGNED OR INTENDED TO FACILITATE MEDICAL EMERGENCIES. ---- The electrocardiogram (ECG/EKG) functionality utilized by this app, available through Apple Watch and Withings devices, is accessible in regions where relevant regulatory clearances—such as FDA clearance, CE marking, UKCA marking, TGA approval, and Health Canada approval—are recognized and in effect.

Screenshots

Qaly | ECG Reader4 screens

Verdict

The call

The clearest difference is review sentiment: Qaly | ECG Reader at 75% against ECG's 11%. Qaly | ECG Reader also leads on rating (4.7 vs 2.6) and update cadence (every 2 weeks vs every 11 months). ECG's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 17.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Qaly | ECG Reader holds the better App Store score, 4.7 against 2.6. That said, the two scores are not equally well evidenced: Qaly | ECG Reader has 867 ratings behind it against 51, so its average is the more settled of the two. Written reviews point the same way: 11% of ECG's written reviews are positive against 75% of Qaly | ECG Reader's.

UpkeepUpdate frequency

ECG ships an update every 11 months, Qaly | ECG Reader every 2 weeks. The most recent releases landed on September 17, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 4 level
ECG versus Qaly | ECG Reader: the parameters behind the verdict, then further details
ParameterECGQaly | ECG Reader
PriceFreeFree
Rating2.6 (51 ratings)4.7 (867 ratings) — better
Positive reviews11.1% of reviews75.1% of reviews — better
Number of ratings51867 — better
Update frequencyEvery 11 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod, Apple Watch — betteriPhone
Requires iOS14.0 — better17.6
Further details — not scored
Size3 MB96 MB
Age rating17+17+
DeveloperApple Inc.Qaly, Inc.

Customer experience

ECG

All ratings51 ratings
Positive35.3%
Neutral9.8%
Negative54.9%
Written reviews18 reviews
Positive11.1%
Neutral5.6%
Negative83.3%

Qaly | ECG Reader

All ratings867 ratings
Positive92.7%
Neutral1.3%
Negative6.0%
Written reviews233 reviews
Positive75.1%
Neutral4.3%
Negative20.6%

Bugs and requests

ECG

Not enough reviews yet to summarise bugs or requests.

Qaly | ECG Reader

Reported bugs

3 issues
  • App crashes on launch
  • Issues deleting account and data
  • Subscription charges not stopping after cancellation

Requested features

4 requests
  • Dark mode option
  • Ability to view past ECG history
  • Integration with more wearable devices
  • Option to request a specific technician review

In-app purchases

None

ECG

No in-app purchases

None

Qaly | ECG Reader

No in-app purchases

Questions

Is ECG free?
ECG is free to download, with no in-app purchases.
Is Qaly | ECG Reader free?
Qaly | ECG Reader is free to download, with no in-app purchases.
Which has better reviews, ECG or Qaly | ECG Reader?
Qaly | ECG Reader is rated higher. ECG averages 2.6 out of 5 from 51 ratings, while Qaly | ECG Reader averages 4.7 from 867 ratings.
Do ECG or Qaly | ECG Reader have ads?
Neither ECG nor Qaly | ECG Reader shows ads.
Which is updated more often, ECG or Qaly | ECG Reader?
ECG ships an update every 11 months, and Qaly | ECG Reader every 2 weeks. Most recently, ECG was updated on September 17, 2026 and Qaly | ECG Reader on October 14, 2026.

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