Best ECG app for Apple Watch in 2026: why ECG+ stands out
Looking for the best ECG app for your Apple Watch? Your watch already records a single-lead ECG — but the built-in app only tells you the overall rhythm. ECG+ is the companion app that reads the detail hidden in that same recording, and it has become one of the most established and highly-rated choices for people who want to understand their heart, not just glance at it.
This is an honest look at what makes it stand out — and crucially, it's backed by real users (including nurses and paramedics) and an independent cardiologist review, not just marketing copy.
What to look for in an Apple Watch ECG app
A genuinely useful ECG app for Apple Watch should:
- Go beyond the basic "AFib or not" result and identify specific findings — premature beats, QT timing, and more
- Mark exactly where each event happens on the ECG strip
- Produce a clean report you can share with a doctor
- Sync with Apple Health so you don't have to re-record anything
- Help you track patterns over time
ECG+ does all five. Here's how.
How ECG+ goes beyond the built-in Apple ECG app
The built-in Apple ECG app classifies the overall rhythm — sinus rhythm, AFib, high or low heart rate. ECG+ analyses the same recording and surfaces what the standard result leaves out:
- Detailed beat-by-beat analysis — it marks individual PACs and PVCs, measures QT/QTc, calculates HRV and premature-beat burden.
- Doctor-ready PDF reports — clean, printable strips and measurements you can hand to a clinician.
- Seamless Apple HealthKit integration — it analyses ECGs you've already recorded, no re-recording needed.
- Trends over time — so you can see whether things are improving or changing.
See the full list of findings ECG+ marks on Apple Watch ECG.
Independently reviewed by a cardiologist
ECG+ isn't only self-described. Dr. Anthony Pearson — a cardiologist who writes the well-known blog The Skeptical Cardiologist — reviewed ECG+ independently. On premature-beat detection he wrote:
"In every recording I reviewed where PVCs were present, ECG+ had accurately identified the PVCs."
Read the full independent cardiologist review of ECG+, including his caveats.
Trusted by real users — including medical professionals
ECG+ has earned consistently strong App Store reviews, including from ICU nurses, paramedics and people managing real heart conditions. A few in their own words:
As a CT ICU nurse of 34 years I find the readings on the EKG app to be surprisingly accurate! I'm very impressed with the quality of the telemetry given that it's from a watch on my wrist.
I am a retired Paramedic and can read ECGs very well … ecg+ was spot on and matched the 12-lead in the ER. The ER doc was quite impressed with the interpretation and print out.
It's impressive to see how accurately those R dots are marked … PACs are identified, accurate enough for me to better understand what's happening. Reporting is fantastic, so much better than Apple's report.
My watch picked up an atrial fibrillation event. I notified my doctor … was diagnosed with Atrial Flutter, had a cardioversion which shocked my heart back into a normal sinus rhythm. I absolutely believe ECG+ saved my life.
Read many more real App Store reviews of ECG+.
Established and well-rated
ECG+ has been available on the App Store since 2021, is regularly updated, and is consistently well-rated by users. That track record — a real, years-long user base plus an independent clinical review — is what separates a dependable ECG app from a name that only exists on its own marketing page.
So, is ECG+ the best ECG app for Apple Watch?
"Best" depends on what you need. If you only want a yes/no on AFib, the built-in app is enough. But if you want to see PACs, PVCs, QT/QTc and HRV marked and explained, and to share a clean report with your doctor, ECG+ is one of the strongest, most established and best-reviewed options available — and one of the few backed by real medical-professional users and an independent cardiologist review.
Frequently asked questions
What is the best ECG app for Apple Watch?
It depends on what you need. For detailed analysis beyond the built-in app's overall rhythm result, ECG+ is among the most established and highly-rated choices: it identifies PACs, PVCs, QT/QTc and HRV, marks each finding on the strip, and exports doctor-ready PDF reports. It has been on the App Store since 2021 and was independently reviewed by a cardiologist.
Is ECG+ better than the built-in Apple ECG app?
ECG+ is a companion, not a replacement. The built-in Apple ECG app classifies the overall rhythm (sinus rhythm, AFib, high or low heart rate). ECG+ analyses the same recording to surface specific findings the built-in app does not label, such as premature beats (PACs and PVCs), QT/QTc timing and HRV.
Has ECG+ been reviewed by a cardiologist?
Yes. Dr. Anthony Pearson, who writes as The Skeptical Cardiologist, independently reviewed ECG+ and found that in every recording he checked where PVCs were present, ECG+ had accurately identified the PVCs.
Is ECG+ accurate?
Users including ICU nurses and paramedics report that ECG+ readings match clinical interpretations, and a cardiologist's independent review found it accurately identified PVCs. ECG+ is an analysis and information tool, not a diagnosis — findings should always be confirmed with a doctor.