The Best Smartwatches with ECG in 2025 (Price & Battery)
1️⃣ Apple Watch Series 9
✔ Price: ~€450-€550
✔ Battery autonomy: Up to 18 hours
✔ Features:
- Electrocardiogram (ECG)
- Blood oxygen meter (SpO2)
- Fall detection & SOS call
- Waterproofing (WR50) – Water resistant
- Always-On Retina Display
- Compatible with iOS (not Android)
- Fast charging (~80% in 45 minutes)
2️⃣ Samsung Galaxy Watch 6
✔ Price: ~€350-€450
✔ Battery autonomy: 1,5 - 2 days
✔ Features:
- Electrocardiogram (ECG)
- Blood pressure monitor (BP)
- Sleep & stress monitoring
- Waterproofing (IP68) – Dust & water resistance
- Super AMOLED display
- Compatible with Android & iOS
- Fast charging (~50% in 30 minutes)
3️⃣ Fitbit Sense 2
✔ Price: ~€250-€300
✔ Battery autonomy: 5-6 days
✔ Features:
- Electrocardiogram (ECG)
- Blood oxygen meter (SpO2)
- Stress detection & sleep monitoring
- Waterproofing (50m) – Ideal for swimming
- OLED touch screen
- Compatible with Android & iOS
- No fast charging
4️⃣ Withings ScanWatch 2
✔ Price: ~€300-€400
✔ Battery autonomy: Up to 30 days!
✔ Features:
- Electrocardiogram (ECG)
- Blood oxygen meter (SpO2)
- Sleep & body temperature monitoring
- Waterproofing (50m) – Water resistance
- Hybrid OLED display (analog & digital clock)
- Compatible with Android & iOS
- The most durable battery
2️⃣ How to Choose the Right One
To find it ideal smartwatch for you, consider the following:
🔹 Price: What is your available budget?
🔹 Battery autonomy: Do you need frequent charging or a long duration?
🔹 Compatibility: Does it fit your phone?
🔹 Data accuracy: Is it certified by official organizations?
🔹 Additional features: It has other features such as sleep monitoring ή blood oxygen levels (SpO2);
✅ Advantages
✔ Continuous heart monitoring
✔ Easy to use without the need for a medical visit
✔ Ability to detect critical situations
❌ Restrictions
❌ They do not replace a complete medical check-up
❌ May give false positive or negative results
❌ Some models require a subscription for full access to data
📊 Comparison of Smartwatches with ECG (2025)
| Feature | Apple Watch Series 9 | Samsung Galaxy Watch 6 | Fitbit Sense2 | Withings ScanWatch 2 |
|---|---|---|---|---|
| Price (€) | € 450- € 550 | € 350- € 450 | € 250- € 300 | € 300- € 400 |
| Battery autonomy | 18 hours | 1,5 - 2 days | 5-6 days | 30 days |
| Electrocardiogram (ECG) | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Blood pressure monitor | ❌ No | ✅ Yes | ❌ No | ❌ No |
| Oxygen meter (SpO2) | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Sleep monitoring | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Waterproofing | WR50 (50m) | IP68 (water & dust resistance) | 50m | 50m |
| Screen | Retina OLED | Super AMOLED | OLED | Hybrid OLED |
| Compatibility | iOS only | Android & iOS | Android & iOS | Android & iOS |
| Fast charging | ✅ Yes (80% in 45') | ✅ Yes (50% in 30') | ❌ No | ❌ No |
🔎 Which Smartwatch to Choose?
✔ For iPhone users: The Apple Watch Series 9 is the best choice, as it provides excellent integration with the Apple ecosystem and advanced health features.
✔ For Android users: The Samsung Galaxy Watch 6 It is ideal, since it has an ECG, a blood pressure monitor, and better battery life than the Apple Watch.
✔ For long battery life: The Withings ScanWatch 2 is the best choice, with 30 days of autonomy and high accuracy in measurements.
✔ For an economical choice with many health functions: The Fitbit Sense2 offers ECG, SpO2 and excellent autonomy (5-6 days) at an affordable price.
📌 Conclusion
(I.e. In conclusion
