Choosing a bathroom scale that does more than tell you your weight has become a standard part of my health routine. When I look at the market for smart scales with heart rate monitors, the options vary wildly in accuracy, connectivity, and price point. The primary tradeoff I see is between simplicity and depth. Do you want a device that gives you a quick glance at your vitals, or are you willing to commit to a subscription for medical-grade insights?
Get wellness gear delivered free with Prime
- Fast, free delivery on millions of items
- Prime Video, Amazon Music and more included
- Member-only deals all year
My top recommendation is the Withings BodyScan 2 for anyone serious about cardiovascular health. It stands out because it doesn’t just estimate heart rate; it includes a 6-lead ECG, which is a significant step up from standard bioimpedance readings found on cheaper models. For those who want a reliable, no-nonsense tracker without ongoing costs, the Masmssm Smart Body Composition Scale offers a robust set of 22 metrics and excellent app integration. Meanwhile, the RunStar is my pick for households with many users, thanks to its support for up to 50 profiles.
Throughout this guide, I will break down exactly how these devices differ. I will explain why the Withings model is better suited for health enthusiasts who want data granularity, while the Masmssm is better for general wellness tracking. By the end, you will know which scale fits your lifestyle, your budget, and your specific health goals.
Key Takeaways
- The Withings BodyScan 2 is the only option here with a true 6-lead ECG, making it superior for cardiovascular monitoring compared to standard BIA scales.
- Most smart scales require barefoot contact and consistent hydration levels to provide accurate heart rate and body composition estimates.
- Subscription models are becoming common; the Withings BodyScan 2 requires a Withings+ subscription for full data access, whereas Masmssm and RunStar do not.
- User profile limits vary significantly, with RunStar supporting up to 50 users, making it ideal for shared households, while Withings caps out at eight.
- Display quality matters for daily use; VA displays on budget models show basic data, while Withings offers a color LCD that provides immediate, detailed feedback.
| Withings BodyScan 2 Smart Scale with 6-Lead ECG, Black |  | Best Premium for Cardiovascular Health | Cardiovascular Features: 6-lead ECG, Impedance Cardiography, Pulse Wave Velocity | Electrodes: 12 | Connectivity: Wi-Fi, Bluetooth | VIEW LATEST PRICE | See Our Full Breakdown |
| Masmssm Smart Body Composition Scale with VA Display |  | Best Overall Value | Metrics Tracked: 22 body metrics including BMI, body fat, muscle mass, heart rate | Display Type: VA Display | User Profiles: Up to 24 | VIEW LATEST PRICE | See Our Full Breakdown |
| RunStar Smart Body Composition Scale with Large Display, App Sync, and 400 lb Capacity |  | Best for Large Households | User Profiles: Up to 50 per account | Body Metrics: 22, including BMI, body fat, muscle mass, heart rate, BMR | Display: Large VA display | VIEW LATEST PRICE | See Our Full Breakdown |
| Withings Body Scan Smart Scale with Segmental Body Composition and ECG, Black |  | Best Compact Premium Option | Weight Precision: 50 g / 0.1 lb | Display: High-visibility color screen | Key Features: Segmental body composition, Arterial age estimate, Heart rate | VIEW LATEST PRICE | See Our Full Breakdown |
| smart scales with heart rate monitor | Connectivity | Display | User Profiles | Health Data Syncing |
|---|---|---|---|---|
| Withings BodyScan 2 Smart Scal | Wi-Fi, Bluetooth | 640 × 172 px Color LCD | Up to 8 | — |
| Masmssm Smart Body Composition | Bluetooth app tracking | — | Up to 24 | Apple Health, Health Connect, Samsung Health, Apple Watch |
| RunStar Smart Body Composition | — | Large VA display | Up to 50 per account | Apple Health, Health Connect, Fitbit |
| Withings Body Scan Smart Scale | App syncing | High-visibility color screen | — | — |
More Details on Our Top Picks
Withings BodyScan 2 Smart Scale with 6-Lead ECG, Black
This model is the clear leader if your primary interest is cardiovascular insight rather than just weight tracking. Unlike the Masmssm or RunStar, which rely on standard bioimpedance to estimate heart rate, the Withings BodyScan 2 utilizes a 6-lead ECG. This allows it to capture actual electrical heart signals, providing data that is closer to medical devices. I find this distinction critical for users who want to monitor arrhythmias or arterial health. The inclusion of 12 electrodes means it measures body composition across the arms, legs, and torso separately, offering segmental analysis that simpler scales cannot match.
The user experience is elevated by a 640 × 172 px color LCD that displays results directly on the handle. This is a significant advantage over the VA displays on the RunStar and Masmssm, which only show numbers. You can see your ECG waveform or body composition breakdown without pulling out your phone. However, this premium experience comes with a catch: full app features require a Withings+ subscription. If you are uncomfortable with ongoing costs, this scale might feel restrictive compared to the one-time purchase model of the Masmssm. For those who value depth of data and are willing to pay for it, this is the most sophisticated option in the lineup.
Pros:- Includes a true 6-lead ECG for detailed heart rhythm analysis
- Uses 12 electrodes for comprehensive segmental body composition
- Wi-Fi syncing ensures data appears in the app without needing a phone nearby
- Color LCD provides rich, immediate feedback on the handle
Cons:- Requires a Withings+ subscription for full data visualization and trends
- Higher price point compared to standard BIA scales
- Heavier and bulkier design due to the handle and electrode array
Best for: Health enthusiasts who want medical-grade cardiovascular data and segmental body composition analysis.
Not ideal for: Budget-conscious buyers or those who dislike mandatory subscription services for core features.
- Cardiovascular Features:6-lead ECG, Impedance Cardiography, Pulse Wave Velocity
- Electrodes:12
- Connectivity:Wi-Fi, Bluetooth
- Display:640 × 172 px Color LCD
- User Profiles:Up to 8
- Weight Graduation:50 g
- Compatibility:iOS, Android, Apple Health, Google Fit
- Subscription:Withings+ required for full features
Our verdict“This is the definitive choice for users who view their scale as a health diagnostic tool rather than just a weight tracker.”
Masmssm Smart Body Composition Scale with VA Display
If you want a comprehensive body composition tracker without the recurring fees of the Withings model, the Masmssm Smart Body Composition Scale is my top recommendation. It strikes an excellent balance between feature depth and ease of use. It tracks 22 body metrics, including BMI, body fat, and heart rate, which covers the vast majority of what a typical user needs. Compared to the RunStar, the Masmssm offers slightly better app integration with Samsung Health and Health Connect, making it a more versatile choice for Android and Apple users alike.
The VA display is crisp and easy to read, showing key readings instantly so you don’t have to wait for the app to sync. I appreciate that it supports up to 24 user profiles, which is double the capacity of the Withings BodyScan 2. While it lacks the ECG capabilities of the premium Withings model, its heart rate estimation via bioimpedance is consistent for trend tracking. The main drawback is that, like all BIA scales, it requires barefoot contact and consistent conditions for accurate body composition data. If you are looking for a reliable, no-subscription workhorse, this scale delivers exceptional value.
Pros:- No subscription required for full feature access
- Syncs with Apple Health, Health Connect, Samsung Health, and Apple Watch
- Supports up to 24 user profiles for large households
- VA display provides immediate weight and metric visibility
Cons:- Body composition accuracy relies on consistent hydration and barefoot use
- No cardiovascular diagnostics like ECG, only basic heart rate estimation
- Plastic and glass build feels less premium than the Withings models
Best for: General users who want accurate weight and body composition tracking without a subscription.
Not ideal for: People with pacemakers or pregnant individuals, as BIA technology is not recommended for them.
- Metrics Tracked:22 body metrics including BMI, body fat, muscle mass, heart rate
- Display Type:VA Display
- User Profiles:Up to 24
- Connectivity:Bluetooth app tracking
- Health Data Syncing:Apple Health, Health Connect, Samsung Health, Apple Watch
- Maximum Capacity:400 lb (180 kg)
- Readout Accuracy:1.6 oz
- Power Source:4 AAA batteries
- Material:5 mm tempered glass
Our verdict“This option stands out as the most practical, subscription-free choice for consistent body composition and heart rate tracking.”
RunStar Smart Body Composition Scale with Large Display, App Sync, and 400 lb Capacity
The RunStar Smart Body Composition Scale differentiates itself with its massive user capacity. Supporting up to 50 user profiles per account makes it the logical choice for gyms, dorms, or very large families. While the Masmssm supports 24 users, the RunStar doubles that number, ensuring that almost no one in your circle will need to manually switch profiles. It also features a large VA display that shows five key health metrics, including heart rate, without requiring you to open the Starfit app immediately.
In terms of measurement, it tracks 22 metrics similar to the Masmssm. However, the RunStar’s listing is less transparent about how its body composition algorithms are validated, which is a slight concern compared to the established reputation of Withings. The baby mode is a thoughtful addition for parents, allowing you to weigh infants while holding them and subtracting your own weight. If you prioritize shared access and basic metric tracking over deep cardiovascular analysis, this scale offers the best utility for multiple users. It lacks the Wi-Fi connectivity of the BodyScan 2, so you will need your phone nearby to sync data, which is a minor inconvenience compared to the subscription model of its competitors.
Pros:- Supports up to 50 user profiles, the highest in this comparison
- Includes a dedicated baby mode for infant weighing
- Large display shows five metrics without needing a phone
- No subscription fees for core tracking features
Cons:- Lacks transparency regarding body composition validation methods
- Bluetooth-only syncing requires the phone to be nearby
- App interface is less polished than Withings or Masmssm
Best for: Large families, gyms, or shared living situations needing many user profiles.
Not ideal for: Solo users who want the highest possible accuracy or advanced cardiovascular diagnostics.
- User Profiles:Up to 50 per account
- Body Metrics:22, including BMI, body fat, muscle mass, heart rate, BMR
- Display:Large VA display
- App:Starfit
- Health Data Syncing:Apple Health, Health Connect, Fitbit
- Weight Capacity:400 lb (180 kg)
- Special Features:Baby mode, Offline measurement
- Material:Tempered glass
- Weight Accuracy:0.1 lb (0.05 kg)
Our verdict“This model is better suited to shared environments where user profile limits are a primary constraint.”
Withings Body Scan Smart Scale with Segmental Body Composition and ECG, Black
This version of the Withings Body Scan sits between the basic scales and the high-end BodyScan 2. It offers segmental body composition insights, allowing you to see muscle imbalances between your left and right sides. This is a feature the Masmssm and RunStar lack entirely. It also estimates arterial age and tracks heart rate, providing a stronger cardiovascular focus than the budget options. The high-visibility color screen is a significant upgrade over the VA displays, making it easier to read trends at a glance.
However, I must note that the arterial age metric is an estimate, not a direct medical measurement. While this is useful for general trend monitoring, it should not replace professional medical advice. Compared to the BodyScan 2, this model appears to have fewer detailed cardiovascular features in the listing provided, lacking the explicit 6-lead ECG mention. If you want the Withings ecosystem and segmental analysis but find the BodyScan 2 too bulky or complex, this is a solid middle ground. It requires careful consideration of app compatibility, as the listing is less specific about subscription requirements than the BodyScan 2, so I recommend verifying current app terms before purchase.
Pros:- Provides segmental body composition to identify muscle imbalances
- High-visibility color screen for easy reading
- Estimates arterial age for cardiovascular trend tracking
- Precise weight measurement of 50 g / 0.1 lb
Cons:- Arterial age is an estimate, not a diagnostic tool
- App compatibility and subscription details are less clearly defined in the listing
- Fewer cardiovascular metrics than the BodyScan 2
Best for: Users who want segmental body analysis and a premium display without the full complexity of the top-tier model.
Not ideal for: Those seeking explicit ECG data or the absolute lowest price point.
- Weight Precision:50 g / 0.1 lb
- Display:High-visibility color screen
- Key Features:Segmental body composition, Arterial age estimate, Heart rate
- Connectivity:App syncing
- Brand:Withings
- Color:Black
- Focus:Body composition and cardiovascular trends
Our verdict“This pick makes the most sense for users who prioritize segmental body insights and a premium display over raw ECG data.”
How We Picked
I selected these four scales based on a strict set of criteria designed to separate marketing hype from functional utility. First, I looked for devices that explicitly feature heart rate monitoring as a core capability, rather than as a secondary, unverified metric. All four products listed meet this baseline requirement. Next, I evaluated the connectivity ecosystem. A scale is only as useful as the data it provides, so I prioritized models that sync seamlessly with major platforms like Apple Health, Google Fit, and Samsung Health.
I also assessed the hardware build quality and display visibility. A scale that is difficult to read in low light or feels unstable underfoot is a poor long-term investment. I compared the accuracy claims, looking for consistent weight graduation increments of 0.1 lb or 50g. Finally, I considered the total cost of ownership. I flagged products that require mandatory subscriptions for basic functionality, ensuring you know exactly what you are paying for. This combination of technical specs, usability, and financial transparency formed the basis of my ranking.
| smart scales with heart rate monitor | Connectivity | User Profiles | Health Data Syncing |
|---|---|---|---|
| Withings BodyScan 2 Smart Scal | Wi-Fi, Bluetooth | Up to 8 | — |
| Masmssm Smart Body Composition | Bluetooth app tracking | Up to 24 | Apple Health, Health Connect, Samsung Health, Apple Watch |
| RunStar Smart Body Composition | — | Up to 50 per account | Apple Health, Health Connect, Fitbit |
| Withings Body Scan Smart Scale | App syncing | — | — |
Factors to Consider When Choosing Smart Scales With Heart Rate Monitors
Buying a smart scale is not just about weight; it is about understanding your body’s composition and health trends. The market is flooded with devices claiming to measure everything from bone density to heart rate. Here is how I filter through the noise to find the right tool for you.
Understanding Heart Rate Monitoring on Scales
Not all heart rate monitors are created equal. Most affordable scales, like the Masmssm and RunStar, use Bioimpedance Analysis (BIA). This sends a tiny, imperceptible electrical current through your body. Because your heart beats, it changes the resistance of your blood vessels, and the scale estimates your heart rate based on those fluctuations. This is fine for general trends but is not as accurate as a chest strap or an ECG. The Withings BodyScan 2 stands out because it includes a 6-lead ECG, which measures electrical activity directly. If you have concerns about heart arrhythmias, the ECG is the only feature that matters. For general wellness, BIA is sufficient.
The Importance of Connectivity and Ecosystems
A scale is useless if the data stays on the device. I look for scales that sync with Apple Health, Google Fit, or Samsung Health. This allows your weight and body composition data to appear alongside your workout data from your watch. The Withings BodyScan 2 offers Wi-Fi syncing, which is a massive convenience. You step on, and the data uploads automatically without you needing to have your phone in your hand. In contrast, the Masmssm and RunStar use Bluetooth, meaning your phone must be nearby and the app open (or running in the background) for the data to sync. Consider how much friction you are willing to tolerate in your daily routine.
Subscription Models vs. One-Time Purchases
The health tech industry is shifting toward subscription models. The Withings BodyScan 2 requires a Withings+ subscription to unlock full historical trends and detailed scores. This can add significant long-term cost. On the other hand, the Masmssm and RunStar are one-time purchases with no mandatory fees for basic tracking. If you prefer to own your data without recurring costs, the budget-friendly options are superior. However, if you value the depth of analysis and community features that subscriptions often provide, the premium models justify their cost through better software.
Accuracy Factors: Hydration and Consistency
I always remind readers that body composition scales are not perfect. They measure impedance, which changes with hydration. If you drink a liter of water or sweat heavily before weighing yourself, your body fat percentage might fluctuate artificially. To get reliable data, you must weigh yourself at the same time of day, under similar conditions. The Withings models are generally more consistent due to their multi-frequency bioimpedance, but even they are affected by external factors. Weight, however, is accurate to within 0.1 lb on all four models, making them reliable for tracking weight loss or gain trends.
Frequently Asked Questions
Can smart scales with heart rate monitors detect heart conditions?
It depends on the technology used. Scales that use standard bioimpedance (BIA) can only estimate your heart rate by detecting changes in blood flow resistance. They cannot detect arrhythmias or specific heart conditions. However, the Withings BodyScan 2 includes a 6-lead ECG, which can detect patterns consistent with atrial fibrillation and other irregularities. Even with an ECG, these devices are screening tools, not diagnostic medical equipment. If you experience chest pain or irregular heartbeats, you should consult a doctor immediately rather than relying solely on scale data.
Why do my body fat percentages fluctuate wildly on smart scales?
This is a common issue with all bioimpedance-based scales, including the Masmssm and RunStar. These scales send a weak electrical current through your body to measure resistance. Water conducts electricity better than fat or muscle. Therefore, if you are dehydrated, your body fat percentage may appear higher. If you have just drunk water or exercised, it may appear lower. To minimize these fluctuations, I recommend weighing yourself first thing in the morning, after using the restroom, and before eating or drinking. Consistency is far more important than the absolute number.
Is a subscription required for all smart scales?
No, not all smart scales require a subscription. The Masmssm and RunStar models allow you to track weight, heart rate, and body composition metrics without any ongoing fees. However, premium devices like the Withings BodyScan 2 often lock detailed historical trends, advanced scores, and specific cardiovascular insights behind a paywall, such as the Withings+ subscription. Before buying, you should carefully check if the features you want are available in the free tier or if they are restricted to the paid plan. For many users, the free tier of budget scales is sufficient for daily tracking.
Are smart scales safe for everyone?
While the electrical current used in bioimpedance scales is extremely low and generally safe for healthy adults, it is not recommended for everyone. Manufacturers typically advise against using these scales if you have a pacemaker or other implanted electronic medical devices, as the current could potentially interfere with the device. Additionally, pregnant women are often advised to avoid body composition measurements, as the hydration changes associated with pregnancy can make the data inaccurate and the electrical current is best avoided as a precaution. In these cases, the weight-only mode is usually safe, but you should consult your doctor first.
How many user profiles do I really need?
The number of profiles you need depends on your household size. The Withings BodyScan 2 supports up to 8 users, which is sufficient for most families. If you live in a larger shared space, such as a dormitory or a gym, the RunStar is a better fit because it supports up to 50 user profiles. The Masmssm sits in the middle with 24 profiles. It is important to note that while having many profiles is convenient, each user must be identified correctly for the data to sync to the correct account. If you have a very large group, the RunStar’s high limit prevents the hassle of manually deleting old profiles to make room for new ones.
Conclusion
Choosing the right smart scale comes down to what you value most: precision, connectivity, or cost. If you are a data-driven individual who wants to monitor cardiovascular health with the highest level of detail available in a consumer device, the Withings BodyScan 2 is the unmatched winner. Its ECG and segmental analysis provide insights that other scales simply cannot offer. For the majority of users who want a reliable, subscription-free experience with solid app integration, the Masmssm Smart Body Composition Scale is the best overall value. It handles heart rate and body metrics well without the friction of monthly fees.
If you are outfitting a shared space or a gym, the RunStar is the practical choice due to its massive user profile capacity. Finally, if you want a balance of premium display quality and segmental body analysis without the full weight of the BodyScan 2, the Withings Body Scan is a worthy middle ground. I recommend assessing your specific health goals and household needs against these distinct strengths to make your final decision.
Cold & flu season Picks
humidifiers
As an affiliate, we earn on qualifying purchases.
