REXQU CardioCall
Records an on-wrist ECG and takes Bluetooth calls, with SpO2, body temperature, sleep and stress on a 1.56″ AMOLED.
On-Wrist ECGBluetooth CallingSpO2 + Temp
2 Colors Available
$159.97
All REXQU ECG Smartwatches
Compare REXQU smartwatches and screenless bands with on-wrist ECG capability by display size, recording style, extra wellness sensors, safety features and price.
REXQU CoreX Pro
A heart-focused smartwatch with on-wrist ECG, heart-rate tracking and cuffless blood-pressure wellness estimates.
ECGBlood PressureBluetooth CallsAMOLED
6 Colors Available
$159.97
REXQU CardioSense
A 30-second ECG on our biggest, easiest-to-read heart-health display — big digits, zero squinting.
30-Sec ECG2.01″ DisplayBlood Pressure
5 Colors Available
$159.97
REXQU AetherX
The flagship-style pick: rotating crown, ~30-second ECG, built-in GPS and a body-temperature sensor.
ECGBuilt-in GPSBody Temperature
2 Colors Available
$199.97
REXQU HealthWave
Combines wrist ECG with heart-rate tracking and cuffless blood-pressure wellness trends in one everyday watch.
Wrist ECGBP WellnessHeart Rate
4 Colors Available
$139.97
REXQU O2Max
On-demand ECG with oxygen-first tracking — blood oxygen one tap away, backed by a big battery.
ECGBlood OxygenBig Battery
6 Colors Available
$169.97
REXQU HealthLink
Your health hub on a 1.95″ AMOLED — on-demand ECG, blood pressure, SpO₂ and body temperature in one place.
ECGSpO₂Temperature
6 Colors Available
$139.97
REXQU Chronex
Engineered for precision — a 30-second ECG and one-button SOS in a classic round design.
30-Sec ECGOne-Button SOSHeart Rate
3 Colors Available
$159.97
REXQU IntelliFit
ECG plus everyday practicality: Bluetooth calls from the wrist, one-button SOS and remote family care.
ECGBluetooth CallsFamily Care
7 Colors Available
$159.97
REXQU Infinity Pro
Premium build with wrist ECG and an app-based wellness report designed for personal trend awareness.
ECG Wellness ReportPremium BuildLong Battery
2 Colors Available
$169.97
REXQU PulseBand
A screenless band with an on-band ECG sensor, heart-rate and HRV tracking, cuffless BP wellness estimates and long battery life.
On-Band ECGHeart Rate + HRV25–30 Day Battery
3 Colors Available
$139.97
Which ECG Watch Is Right for You?
Compare displays, ECG style and each model’s stand-out feature across the range.
| Model | Display | ECG | Stand-out Feature | Price |
|---|---|---|---|---|
| REXQU CardioCall | 1.56″ AMOLED | On-wrist | Bluetooth calling + SpO₂ + temperature | $159.97 |
| REXQU CoreX Pro | AMOLED | On-wrist | Heart rate + BP wellness estimates | $159.97 |
| REXQU CardioSense | 2.01″ — our biggest | 30-second | Big digits, one-tap readings | $159.97 |
| REXQU AetherX | Rotating crown | ~30-second | Built-in GPS & body temperature | $199.97 |
| REXQU HealthWave | — | Wrist ECG | ECG + heart rate + BP wellness trends | $139.97 |
| REXQU O2Max | — | On-demand | Blood oxygen one tap away, big battery | $169.97 |
| REXQU HealthLink | 1.95″ AMOLED | On-demand | Adds body temperature tracking | $139.97 |
| REXQU Chronex | 1.43″ AMOLED | 30-second | One-button SOS | $159.97 |
| REXQU IntelliFit | 1.91″ HD | On-wrist | Bluetooth calls, SOS & family care | $159.97 |
| REXQU Infinity Pro | 1.56″ AMOLED | Wrist ECG | ECG wellness report | $169.97 |
| REXQU PulseBand | Screenless band | On-band sensor | 25–30 day battery, no subscription | $139.97 |
Why Choose an ECG Smartwatch?
An ECG smartwatch (also called an EKG watch) records a short electrical tracing of your heart rhythm from the wrist during an active recording. On many wearable models, you touch a sensor with a fingertip and remain still while the watch captures a single-lead style tracing. That can be useful for personal rhythm awareness and for keeping a record you may choose to discuss with a healthcare professional.
A wrist ECG is not the same as a clinical 12-lead ECG, and a consumer watch cannot diagnose a heart condition on its own. If you want to understand that distinction before choosing a model, read our single-lead ECG smartwatch guide and the AFib Health Guide. The American Heart Association also explains how a clinical electrocardiogram (ECG/EKG) is used in medical care.
The REXQU range covers different priorities. The CoreX Pro combines wrist ECG with heart-rate tracking and cuffless BP wellness estimates; the AetherX adds built-in GPS and temperature tracking; the CardioSense emphasizes a large display; the CardioCall adds Bluetooth calling; and the screenless PulseBand offers ECG capability without a display. For a broader comparison, use the Best ECG Smartwatch buying guide. If blood-pressure wellness tracking is your priority, compare the blood pressure smartwatch collection, or browse all health smartwatches.
REXQU watches are consumer wellness devices, not medical devices. Wrist ECG recordings are for personal reference and trend awareness and should not replace a clinical ECG, diagnosis, treatment or professional medical advice.
How an ECG Smartwatch Works, and What It Is Not
A wrist ECG is a genuinely interesting piece of consumer technology and one of the easiest to misread. It is worth understanding exactly what the trace represents before you buy, because the honest version is still a good reason to own one.
One lead, not twelve
A clinical ECG uses twelve leads placed around the torso to view the heart from many angles. A watch closes a single circuit between your wrist and the fingertip you rest on the crown or bezel, giving one lead. That is enough to show rhythm and rate. It is not enough to assess a heart attack, and no wrist device should ever be used to rule one out. Chest pain means emergency services, not a watch reading.
Rhythm is the thing it is actually good at
Irregular rhythms come and go, which is exactly why they are missed in a clinic appointment. A device you wear lets you capture a trace at the moment something feels wrong. The American Heart Association describes atrial fibrillation as an irregular heartbeat that raises stroke risk, and being able to record and show a clinician what your heart did on Tuesday evening is real value. What a smartwatch can and cannot tell you about AFib goes further.
Contact quality decides whether the trace is readable
Dry skin, a loose strap, a moving arm or a light fingertip all produce noise that looks like a problem and is not. Sit still, rest your forearm on a table, keep firm contact for the full recording, and repeat the reading before drawing any conclusion from it.
Wellness device, not a diagnostic one
The FDA draws this line explicitly in its General Wellness: Policy for Low Risk Devices guidance: products for maintaining a healthy lifestyle, unrelated to diagnosing or treating disease, sit outside device regulation. REXQU watches are wellness products. They record traces for you to keep and share with a clinician; they do not diagnose, and their output should never drive a medication or treatment decision.
Decide which other features you want alongside it
ECG rarely travels alone — depending on the model you can add satellite positioning, calling, water resistance or a screenless form factor. See ECG with GPS, ECG with Bluetooth calling, waterproof ECG models, screenless ECG bands, or the full ECG smartwatch guide.
ECG Smartwatch FAQs
What is an ECG smartwatch and how does it work?
An ECG smartwatch records a short electrical tracing of your heart rhythm from the wrist. On many models, you touch a sensor with a fingertip and remain still for roughly 30 seconds while the watch captures the tracing. Recording method and app features vary by model. REXQU watches are consumer wellness devices, not diagnostic medical devices.
Is an EKG watch the same as an ECG watch?
Yes. ECG and EKG are two abbreviations used for electrocardiogram. In smartwatch shopping, “ECG watch” and “EKG watch” generally refer to the same type of wrist rhythm-recording feature.
Which REXQU smartwatch has the best ECG?
There is no single best model for everyone. Choose by the other features you value: the CoreX Pro combines ECG with heart-rate and BP wellness tracking; the AetherX adds GPS; the CardioSense emphasizes a large display; and the CardioCall adds Bluetooth calling. See the ECG smartwatch buying guide for the full comparison.
Is there an ECG tracker without a screen?
Yes. The REXQU PulseBand is a screenless band with an ECG sensor plus heart-rate and HRV tracking and other wellness features. Check the product page for current battery and app specifications.
Do ECG smartwatches also track blood pressure?
Many REXQU ECG models also provide cuffless blood-pressure wellness estimates, but features vary by model. Wrist BP estimates are not a replacement for a validated upper-arm cuff when you need a clinical measurement. Compare the blood pressure smartwatch collection if that feature is a priority.
Which ECG watch is best for seniors?
Look for a readable display, simple controls and the communication or safety features the wearer actually needs. Models such as CardioSense, IntelliFit and Chronex serve different priorities. See the Smartwatches for Seniors collection for more options.
Do ECG watches work with iPhone and Android?
Many REXQU ECG models support both iPhone and Android through companion apps, but compatibility and app requirements vary by model. Check the individual product page before buying. REXQU models in this collection are sold without a required monthly REXQU subscription.
Can an ECG smartwatch diagnose AFib or another heart condition?
No consumer smartwatch should be treated as a stand-alone diagnosis. A wrist ECG can record rhythm information that may be useful for personal awareness, but interpretation and diagnosis belong with a qualified healthcare professional. Read our AFib Health Guide for a fuller explanation.
ECG Smartwatch Guides
- Health Guide: Can a Smartwatch Detect AFib?
- How to Share ECG Smartwatch Readings With Your Doctor
- ECG Smartwatch With Bluetooth Calling: REXQU CardioCall
- Best Smartwatch With ECG and Blood Pressure: CoreX Pro vs CardioSense
- ECG Smartwatch With GPS: Why the AetherX Stands Out
- Waterproof ECG Smartwatch: IP67 vs IP68 Explained
- Buying Guide: Best ECG Smartwatch — Complete REXQU Guide
- Single-Lead ECG Smartwatch: What It Can (and Can’t) Show
- ECG Smartwatch Risk Assessment: Accuracy & Limits
- Research hub: REXQU Wearable Health Guides
- How we research: Editorial & Research Standards
- Can a Smartwatch Detect AFib? What ECG Watches Show
- Screenless ECG Smartwatch: How PulseBand Works