NewHeart Rate Timeline and Trends on Apple Watch arrived in 1.3. See what's new

A closer look at 
your Apple Watch ECG.

Explore the waveform, inspect possible findings and see how your measurements change over time.

Free plan with 3 full analyses every month.
ECG Tracker+ Library listing 18 Apple Watch ECG recordings, each with its classification, heart rate, HRV and QTc, plus a tag, a note and a possible PVC ECG Tracker+ Measurements for an Apple Watch ECG: heart rate 66 bpm, R-R interval 905 ms, HRV (rMSSD) 28 ms, QRS duration 70 ms, QRS amplitude 2.93 mV, QT interval 398 ms and QTc (Framingham) 413 ms, with reference ranges ECG Tracker+ waveform highlighting a possible PVC, with adjacent RR intervals of 465 and 842 ms and the full single-lead limitation. ECG Tracker+ Trends for the last 30 days: a plain-language recap across 14 ECGs with a 74 bpm median heart rate, and heart rate and beat regularity charts

Real app screens with demonstration recordings.

ECG Tracker+ imports the 30-⁠second ECGs from your Apple Watch and measures them right on your iPhone.

Informational measurement and visualization tools. Not a diagnosis. Seek medical care for concerning symptoms, regardless of the app’s results.

Every detail of your Apple Watch ECG. And the context around it.

ECG Tracker+ turns the 30-⁠second single-⁠lead ECG from your Apple Watch into something you can measure, question and understand.

Understand every number. Tap any measurement for a plain-⁠language guide to what it is, how it's read and what can affect it.

NewSee each value in context. Compare a reading with the adult reference range and with your own earlier ECGs, measured the same way.

Possible extra beats, marked. A possible PAC or PVC is highlighted on the waveform, with the R-⁠R intervals around it and a note on what one lead cannot confirm.

Measure right on the waveform. Zoom in, move through all 30 seconds and place calipers to read the time between any two points.

The beat behind the estimate. Open a single beat with its P, QRS and T markers and see how it compares with the value for the whole recording.

NewA whole day of heart rate. Heart Rate Timeline brings your Apple Health heart-⁠rate readings and your ECGs together in one daily view.

Privacy

Private by design.

An ECG is one of the most personal things you can record.So ECG Tracker+ analyzes every recording right on your iPhone.The app never uploads your recordings, so we never see them.And no AI company gets to read them, keep them or learn from them.

Analyzed on your iPhone

Heart rate, intervals, possible findings and Trends are all worked out on the device in your hand. Nothing is sent to a server for analysis.

No cloud AI

Some apps send your ECGs to an outside AI service. ECG Tracker+ has no integration with any external AI provider, so your recordings are never sent off to become training data.

No account

No sign-⁠up, no email and no profile. Open the app, allow access to your ECGs and you are ready.

You stay in control

Apple Health access is read-⁠only and covers only what you allow. Delete any recording and its analysis in the app whenever you like.

Read the Privacy Policy

Apple Watch

Your ECG results, back on your wrist.

Record an ECG with Apple's ECG app. ECG Tracker+ analyzes it on your iPhone and sends the results straight back to your Watch.

  1. 01

    Every recording, a glance away.

    Scroll through your ECGs with their classification and heart rate. A possible PVC or PAC is flagged in the list, and the recording shows you the beat on its waveform.

  2. 02

    Your trends travel with you.

    Swipe to Trends for heart rate, beat regularity and more, with the same medians you see on your iPhone.

ECG Tracker+ on Apple Watch Ultra listing ECG recordings, with a possible PVC flagged on one of them An ECG recording on Apple Watch Ultra with a possible PVC marked on the waveform
ECG Tracker+ on Apple Watch Ultra showing a 30-day heart rate trend with a median of 74 bpm

Keep your iPhone nearby and unlocked for the fastest handoff. Longer Trends ranges on Apple Watch are part of Pro.

Real Apple Watch screens with demonstration data.

PDF export

Your ECG, ready
for the appointment.

Turn any recording into a clean, printable report with the full 30-⁠second strip, your measurements and your notes. Share it from your iPhone or print it for the visit.

See how PDF export works
ECG Tracker+ Export PDF screen with an up-to-date report preview, export options and a Share PDF button
A print-ready ECG Tracker+ PDF report: a 30-second calibrated ECG strip with R-R markers, plus measurements, a representative beat, an HRV plot and the rhythm classification

Example PDF report with informational measurements and the original recording.

ECG library

Know what you’re looking at.

Every measurement and finding in the app, shown on a real single-⁠lead ECG and drawn by the app’s own waveform view.

Heart rate and R-⁠RBeats per minute, and the time from one beat to the next. P waveThe small wave before each beat, when the upper chambers are activated. PR intervalFrom the start of the P wave to the start of the QRS. QRS durationHow long the main spike of each beat lasts. QRS amplitudeThe height of the main spike, in millivolts. QT and QTcFrom the start of the QRS to the end of the T wave, corrected for heart rate. HRVHow much the time between beats varies, as rMSSD and SDNN. Sinus rhythmA regular rhythm set by the heart’s natural pacemaker. PACAn early beat from the upper chambers, usually narrow. PVCAn early, wide beat from the lower chambers, often followed by a pause. BigeminyEvery second beat is an early beat. TrigeminyEvery third beat is an early beat. Wide QRSA QRS that lasts longer than usual, as in a bundle branch block. T-⁠wave inversionA T wave that points down where it usually points up.

How the app measures

From first recordings to regular check-⁠ins.

What people are saying in their App Store reviews.

Jun 16, 2026

Really useful data

Great app with more detailed data than Apple gives. Presented in a clear way and a great looking UI
avensusApp Store, United Kingdom
Aug 2, 2026

Great product

I have tried many ECG trackers on iOS. This is by far the best. Lots of detail and valuable information. The developer (Artur) response is fast and useful. [...]
GO1XApp Store, Netherlands
Apr 5, 2026

Great update!

The hard work of the developer is definitely noticeable! The app offers a lot of information and is (in my opinion) as complete as it can be compared to different apps (e.g. PVC, PAC, QTc, etc). It is great for educational purposes because it’s not just measurements with no understanding. [...]
🙈Lalalala🙈App Store, Netherlands
Apr 5, 2026

Great

Shows insights and trends very well!
UnrulyHumanApp Store, United States
Feb 26, 2026

Great app

A really nice app. It's clear and easy to use. Very useful for someone like me who often sees a cardiologist and can bring the measurements along for the doctor to look at as an extra source. I honestly recommend it :)
SmallMushroom99App Store, PolandTranslated from Polish
Apr 12, 2026

informative

quite useful to review all ECG data with a bunch of details..
Ercan KaymakApp Store, United Kingdom

Real App Store reviews. Longer reviews are shortened where marked, and the Polish review is translated.

Free plan

We give you 3 full ECG analyses every month. Free.

No hard paywall and no trial that runs out. ECG Tracker+ is useful from day one, and the subscription is there only if you want unlimited analysis.

  • No hard paywall
  • No account
  • No card
ECG Tracker+ Free and Pro compared
FreeYours to keepProOptional
View every Apple Watch ECGIncludedIncluded
Full ECG analysisQTc, PR, QRS, HRV and early beats3 a monthUnlimited
PDF report for your doctor3 a monthUnlimited
TrendsHeart rate and regularity, 7 daysEvery metric, any range

Free unlocks refresh every 31 days, and unlocked recordings stay unlocked.

Understand your Apple Watch ECG.

Clear guides to what a 30-⁠second single-⁠lead recording shows, what each measurement means and how to share it with your clinician.

All guides
How to read an Apple Watch ECG: a practical guide to your waveformP wave, QRS, T wave, heart rate and intervals. A step-⁠by-⁠step guide to your 30-⁠second strip.Read the guide Apple Watch ECG results explained: every classification and what it meansSinus Rhythm, AFib, High or Low Heart Rate, Inconclusive and Poor Recording, explained one by one.Read the guide Can an Apple Watch ECG show PVCs and PACs? What extra beats look likeWhat extra beats look like on the waveform, why they are only possible and what a 30-⁠second strip cannot tell you.Read the guide QT and QTc on an Apple Watch ECG: formulas, ranges and why apps differHow QTc is calculated, typical ranges, why formulas disagree and what a watch recording can show.Read the guide HRV from an Apple Watch ECG: rMSSD, SDNN and how it differs from Apple HealthrMSSD vs SDNN, why Apple Health's HRV is different and what a 30-⁠second ECG can show.Read the guide Apple Watch ECG says Inconclusive? Why it happens and what you can still seeHeart rate, extra beats, pacemakers or signal. Why the Watch cannot classify some recordings.Read the guide

A few useful answers.

Something else on your mind? The guides go deeper into each measurement.

ECG Tracker+ imports your Apple Watch ECG recordings and shows them in detail on your iPhone: the full waveform, QTc and HRV estimates, QRS, possible early beats, Beat Morphology, Trends and a PDF report you can share. Everything runs on your iPhone, and the free plan includes three full analyses a month.

No. ECG Tracker+ is an informational measurement and visualization tool. It does not provide a diagnosis and is not a substitute for professional medical advice. Always talk to a clinician about your heart health.

ECG Tracker+ runs on iPhone and reads any Apple Watch ECG that has synced to the Health app, including older ones. You don't need to record anything new.

Your ECG recordings and their analysis stay on your iPhone and paired Apple Watch. There is no account, and no recording is ever uploaded for analysis.

Yes. The free plan has no time limit and needs no account or card. It includes three full analyses every month, which can be enough if you record an ECG only now and then. If you record more often, Pro unlocks every recording.

Importing and viewing every recording is free. Every 31 days you also get three free unlocks, and each one opens the complete analysis of a recording, with every measurement and a PDF report. Unlocked recordings stay unlocked. Pro opens the full analysis for every recording, plus every trend metric and time range.

It shows the full waveform with heart rate, R-⁠R and PR intervals, QRS duration and amplitude, QT and QTc estimates, and ultra-⁠short HRV estimates such as rMSSD and SDNN. A signal-⁠quality score shows how usable each recording was. Everything is informational, not a diagnosis.

ECG Tracker+ estimates QT from the single-⁠lead waveform and calculates QTc with Bazett, Fridericia, Framingham or Hodges. Formula choice, heart rate and waveform quality can change the result. These estimates do not diagnose or rule out any condition.

Heart rate variability describes how the time between heartbeats changes. ECG Tracker+ estimates rMSSD and SDNN from each 30-⁠second recording and charts them over time in Trends. These ultra-⁠short estimates are informational, not a diagnosis.

It can mark possible early beats, such as a possible PAC or PVC, for you to review. A mark is not a confirmed finding, and no mark does not rule out early beats. Talk to a qualified clinician if you have concerns.

Export a recording as a clean PDF with the calibrated ECG strip, informational measurements, a representative beat and the Apple Watch rhythm classification. Bring it to an appointment or send it to a clinician.

Take an ECG with Apple's ECG app, then open ECG Tracker+ on your Watch to review results sent from your paired iPhone. The iPhone imports and analyzes the ECG on-⁠device. Keep it nearby and unlocked for the fastest handoff. If it is locked, ECG Tracker+ catches up after you unlock it.

Try ECG Tracker+
for free today.

Free plan with 3 full analyses every month. For iPhone, with an Apple Watch companion.