Best Withings Smartwatches with ECG in 2026: 2 Picks
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Finding the best withings smartwatches with ECG requires comparing key health and hardware specs. We evaluated 2 models based strictly on the specifications published on the listings. Our top pick is the Withings ScanWatch Nova 39mm Silver. It leads because its 39mm size offers a compact design ideal for long battery life and health tracking. This guide helps you decide which device fits your wrist and health needs.
Choose size based on your wrist
The top picks differ primarily in case diameter. The number one choice features a 39mm case, while the second option offers a 38mm hybrid design. You should select the model that fits your wrist comfortably. Both include ECG and SpO2 sensors for health monitoring. Check the band material and compatibility with your phone before buying.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Withings ScanWatch Nova 39mm Silver Best overall | long battery life and health tracking | |
| 2 | Withings ScanWatch 2 38mm Hybrid Best sleep tracking | long battery life and medical monitoring |
The best fit for you
- You want the best overall ECG watch with long battery – Withings ScanWatch Nova 39mm Silver – The 39mm case and silver finish support its long battery life for daily health tracking.
- You prioritize medical-grade sleep tracking and water resistance – Withings ScanWatch 2 38mm Hybrid – This hybrid model includes SpO2 and ECG sensors for comprehensive medical monitoring and sleep data.
- You need a compact hybrid watch compatible with Android – Withings ScanWatch 2 38mm Hybrid – The 38mm black design works with both Android and iOS for versatile medical monitoring.
Withings ScanWatch Nova 39mm Silver
Best for: long battery life and health tracking
- Features
- SpO2, ECG
- Case Size
- 39mm
- Battery Life
- 30 days
- Connectivity
- Connected GPS
- Target Audience
- Women
- Color
- Silver
This Withings smartwatch features a 39mm case and 30-day battery life. It includes ECG, SpO2, and temperature tracking. The device offers 40+ auto-recognized activities and connected GPS. It suits users who want long battery life and health monitoring without daily charging. The silver finish adds a classic look to the fitness tracker.
- 30-day battery life
- 39mm case size
- ECG and SpO2 sensors
- 24/7 temperature tracking
- Connected GPS
- Heavier build at 14.8 ounces
- Smaller 39mm case compared to larger options
- You want a smartwatch with a 30-day battery life
- You prefer a 39mm case size
- You need ECG and temperature tracking
- You need a larger case size
- You want a lighter device under 14 ounces
- You require built-in GPS without a phone
Verdict: Withings ScanWatch Nova Brilliant 39mm fits users who prioritize long battery life and compact design. It is ideal for those who want health tracking without frequent charging.
Withings ScanWatch 2 38mm Hybrid
Best for: long battery life and medical monitoring
- Features
- Sleep Tracking, SpO2, ECG
- Case Size
- 38mm
- Battery Life
- Up to 35 days
- Display Type
- Hybrid
- Case Material
- Stainless steel
- Target Audience
- Women
The Withings ScanWatch 2 combines a stainless steel case with sapphire glass and a hybrid display. It offers up to 35 days of battery life and medical-grade ECG monitoring. This 38mm model tracks sleep stages, SpO2, and temperature. It suits users who want a durable watch with extensive health insights and long power endurance on a single charge.
- Up to 35 days of continuous battery life
- Medical-grade 30-second ECG and AFib detection
- Stainless steel case with sapphire glass durability
- Tracks sleep stages, SpO2, and temperature
- 38mm case size is smaller than the 42mm alternative
- Hybrid display lacks full-screen digital interface
- Weight of 1.94 ounces adds noticeable bulk
- You prefer a classic analog watch appearance
- You want up to 35 days of battery life
- You need medical-grade ECG monitoring
- You need a larger 42mm case size
- You want a full digital smartwatch display
- You prefer a lighter sub-1.5 ounce build
Verdict: Withings ScanWatch 2 38mm Hybrid is a durable health tracker for users who prioritize long battery life and medical-grade monitoring in a classic design.
Specifications side by side
| Spec | Withings ScanWatch Nova 39mm Silver | Withings ScanWatch 2 38mm Hybrid |
|---|---|---|
| Case Size | 39mm | 38mm |
| Battery Life | 30 days | Up to 35 days |
| Display Type | – | Hybrid |
| Connectivity | Connected GPS | – |
| Case Material | – | Stainless steel |
| Target Audience | Women | Women |
| Features | SpO2, ECG | Sleep Tracking, SpO2, ECG |
| Color | Silver | Black |
| Compatibility | – | Android, iOS |
| Water Resistance | – | Waterproof |
| Weight | 14.8 ounces | 1.94 ounces |
| Dimensions | – | 9.45 × 1.61 × 0.51 inches |
| Size | 39mm | 38mm |
| Model | HWA10-model 10-All-Int | HWA10-model 1-All-Int |
Check specs before buying
Match target audience
Review the target audience listed in the product attributes. The ScanWatch Nova 39mm Silver is marked for women. This designation often indicates a smaller case size or specific band options. If you prefer a watch designed for a smaller wrist, this model may fit better. Check the size specification to confirm the case diameter. A 39mm case suits many users. Ensure the dimensions align with your wrist circumference for comfort and accurate sensor contact during daily wear.
Verify connectivity
Check the compatibility section for supported operating systems. The ScanWatch 2 38mm Hybrid lists compatibility with both Android and iOS devices. This ensures you can pair the watch with your current phone without issues. Verify this spec before purchasing to avoid connectivity problems later. Seamless integration allows you to receive notifications and sync health data efficiently. Confirm your phone model is supported to ensure full functionality of the ECG and SpO2 features.
Assess water resistance
Look for water resistance ratings in the attributes. The ScanWatch 2 38mm Hybrid is described as waterproof. This spec indicates it can withstand splashes and rain. Check if the rating meets your needs for swimming or showering. Higher water resistance allows for more activities without removing the device. Ensure the seal remains intact for accurate heart rate monitoring during exercise. This feature is essential for users who engage in water-based workouts regularly.
Compare weight specs
Examine the weight specification for comfort during long wear. The ScanWatch 2 38mm Hybrid weighs 1.94 ounces. The ScanWatch Nova 39mm Silver weighs 14.8 ounces, which may be a data entry error for grams or a different unit. Compare these values to determine what feels lightest on your wrist. A lighter watch reduces fatigue during sleep tracking. Heavier watches may feel more substantial but could cause discomfort. Choose the weight that suits your preference for all-day wear.
Check sensor features
Review the features list for health monitoring capabilities. Both models include ECG and SpO2 sensors. The ScanWatch 2 38mm Hybrid also lists sleep tracking. These sensors provide medical-grade data for heart rhythm and blood oxygen levels. Ensure the specific sensors you need are included in the attributes. ECG is vital for detecting atrial fibrillation. SpO2 helps monitor oxygen saturation. Verify these specs align with your health monitoring priorities before making a decision.
Frequently asked questions
Does the Withings ScanWatch Nova support ECG monitoring?
Yes, the Withings ScanWatch Nova 39mm Silver includes ECG functionality. This feature allows you to record your heart rhythm at any time. The device also tracks SpO2 levels. These health metrics are essential for comprehensive daily monitoring. The 39mm case size makes it suitable for users seeking a compact design.
Is the Withings ScanWatch 2 waterproof?
Yes, the Withings ScanWatch 2 38mm Hybrid is waterproof. This specification ensures you can wear it during handwashing or swimming. The hybrid design combines classic aesthetics with modern health tracking. It includes ECG and SpO2 sensors for medical-grade monitoring. The black color option is available for this durable model.
Which Withings ECG watch is best for sleep tracking?
The Withings ScanWatch 2 38mm Hybrid is designated as the best option for sleep tracking. It offers medical-grade monitoring capabilities alongside standard health features. The device includes SpO2 and ECG sensors. These tools help you analyze your rest quality. The hybrid design ensures long battery life for consistent data collection.
What size options are available for Withings ECG watches?
The current list features two distinct case diameters. The top pick, the ScanWatch Nova, has a 39mm case. The second option, the ScanWatch 2, features a 38mm hybrid design. You should choose the size that fits your wrist comfortably. Both models support ECG and other health tracking features.
Does the ScanWatch Nova target a specific audience?
Yes, the Withings ScanWatch Nova 39mm Silver is marked for women. This designation often indicates a smaller case size or specific band options. The 39mm silver finish supports a compact design. It is ideal for users who prioritize long battery life and health tracking without frequent charging.
What health sensors are included in the ScanWatch 2?
The Withings ScanWatch 2 38mm Hybrid includes SpO2 and ECG sensors. It also features dedicated sleep tracking capabilities. These sensors provide comprehensive medical monitoring. The device is compatible with both Android and iOS systems. The waterproof construction adds to its versatility for daily use.
Is the ScanWatch 2 compatible with Android phones?
Yes, the Withings ScanWatch 2 38mm Hybrid is compatible with Android devices. It also works with iOS systems. This flexibility allows you to sync your health data regardless of your phone choice. The hybrid design includes ECG and SpO2 sensors for detailed health insights. The black color is available for this versatile model.
See also
- Kids vs Men Smartwatches: Which Should You Buy?
- 5 Best Apple 41Mm Smartwatches, Compared
- Best Apple Stainless Steel Smartwatches in 2026: 3 Picks
- Best Google Smartwatches with Sleep Tracking: 2 Spec-Based Picks
- Band Material Explained: What It Means for Smartwatches
- Titanium or Aluminum Smartwatches? Compared by Specs