Best ECG Smartwatches 2025 – Apple, Samsung, Pixel & More
Electrocardiogram (ECG or EKG) sensors in smartwatches have transitioned from niche features to essential tools for proactive heart monitoring. With FDA-cleared models now available across major brands, users can track potential signs of atrial fibrillation (AFib) or irregular heart rhythms right from their wrist.
In this 2025 expert guide, we round up the best ECG smartwatches across platforms and budgets — including Apple, Samsung, Google, Fitbit, Withings, and Garmin.
List of Best ECG Smartwatches in 2025
Apple Watch Series 10 / Ultra 2
Specs:
- ECG: Yes (FDA-cleared)
- OS: watchOS 11
- Battery: 36–72 hours (Ultra 2)
- Compatibility: iPhone only
The gold standard for ECG in wearables. Apple’s latest watches continue to deliver clinical-grade accuracy with seamless integration into the Health app. Whether you’re tracking AFib over time or just want peace of mind, Apple’s ECG app is intuitive and fast.
The Apple Watch Ultra 2 is especially ideal for outdoor athletes and tech-savvy users with its extra battery and rugged body.
Samsung Galaxy Watch 7 / Watch Ultra
Specs:
- ECG: Yes (FDA-cleared in supported regions)
- OS: Wear OS 5 + One UI Watch
- Battery: ~40 hours
- Compatibility: Android only
Samsung’s Galaxy Watch 7 brings refined sensors, quick ECG recordings, and strong sleep/heart monitoring features. ECG access depends on region, but in the U.S., it’s fully functional and cleared.
For Android users — especially Samsung Galaxy phone owners — this is the top ECG-capable smartwatch to consider.
Google Pixel Watch 3
Specs:
- ECG: Yes (FDA-cleared)
- OS: Wear OS 5
- Battery: ~24 hours
- Compatibility: Android only
Google’s newest Pixel Watch 3 refines its sensor suite with Fitbit-backed ECG readings and improved accuracy. It’s stylish, compact, and integrates beautifully with Android and Fitbit apps.
While battery life could be better, ECG scans are quick, readable, and shareable with doctors.
Fitbit Sense 2
Specs:
- ECG: Yes (FDA-cleared)
- OS: Fitbit OS
- Battery: ~6 days
- Compatibility: iOS & Android
For those preferring Fitbit’s lightweight interface and stress tracking, the Sense 2 remains a solid ECG watch. It records AFib data, stores scan history, and syncs to your Fitbit dashboard or health app.
Despite newer models launching, this remains the best Fitbit for full-scale health tracking including ECG.
Fitbit Charge 6
Specs:
- ECG: Yes (via Fitbit app)
- Type: Fitness band with ECG
- Battery: ~6 days
- Compatibility: iOS & Android
If you want a compact tracker instead of a full watch, Charge 6 is the only fitness band on this list with FDA-cleared ECG support. Ideal for minimalist users who want passive heart health monitoring.
It’s affordable, comfortable, and works well for everyday wear.
Withings ScanWatch 2 / Nova
Specs:
- ECG: Yes (FDA-cleared)
- Type: Hybrid smartwatch
- Battery: ~30 days
- Compatibility: iOS & Android
Withings continues to lead with its hybrid smartwatches, blending analog style with medical-grade ECG tech. A 30-second scan records clear ECG data and syncs with the Health Mate app.
The ScanWatch Nova offers a premium stainless steel design with sapphire glass, while maintaining the same heart health features.
Garmin Venu 3 / Forerunner 970 / Fenix 8
Specs:
- ECG: Yes (region-limited rollout)
- OS: Garmin proprietary
- Battery: 10–14 days
- Compatibility: iOS & Android
Garmin recently began integrating ECG into select premium watches. While regional rollout is still ongoing, the feature is active in the U.S. and select EU areas. The ECG function pairs well with Garmin’s athlete-grade data.
Ideal for performance-focused users who also want heart health insights without sacrificing battery life.
Comparison Table
| Model | ECG Support | ECG Accuracy | Battery | Best For |
|---|---|---|---|---|
| Apple Watch S10/Ultra 2 | ✅ FDA-cleared | High clinical-grade | 36–72 hrs | iPhone users needing top ECG |
| Galaxy Watch 7 | ✅ FDA-cleared | Region-limited | ~40 hrs | Android/Samsung phone owners |
| Pixel Watch 3 | ✅ FDA-cleared | Fitbit-grade | ~24 hrs | Android users with Google focus |
| Fitbit Sense 2 | ✅ FDA-cleared | Strong health sync | ~6 days | Fitbit ecosystem fans |
| Fitbit Charge 6 | ✅ FDA-cleared | Fitness band ECG | ~6 days | Compact & minimalist users |
| Withings ScanWatch 2 | ✅ FDA-cleared | Excellent hybrid ECG | ~30 days | Analog look + medical accuracy |
| Garmin Venu 3/Fenix 8 | ✅ Region-limited | Athlete ECG data | ~10–14 days | Pro users with Garmin ecosystem |
Final Verdict
If you want the most accurate and user-friendly ECG watch, Apple Watch Series 10 or Ultra 2 is unmatched — provided you use an iPhone. Android users have excellent options in the Galaxy Watch 7 and Pixel Watch 3, both offering FDA-cleared readings.
Prefer a fitness-focused device? Go with Fitbit Sense 2 or the sleek Charge 6. Hybrid lovers will adore the Withings ScanWatch Nova, and outdoor athletes can count on Garmin’s top-tier lineup to deliver.
No matter your platform or style, there’s a trusted ECG smartwatch ready to monitor your heart health in 2025.
FAQ
1. How accurate are ECG smartwatches?
FDA-cleared watches like Apple, Samsung, and Fitbit provide clinically tested single-lead ECG readings — great for screening AFib or irregular rhythm.
2. Can I use ECG without a phone?
Most watches require a phone for setup and viewing full ECG reports.
3. Are ECG smartwatches approved globally?
Not always. ECG features may be region-locked based on regulatory approvals. Check your country before purchase.
4. How often should I use the ECG feature?
Use as recommended by your doctor or for irregular symptoms. Some models offer passive detection, others require manual scanning.
5. Are ECG readings stored securely?
Yes. Data is encrypted and stored within the device’s health ecosystem (Apple Health, Fitbit, etc.).
