Etekcity ESF551 Smart Fitness Scale vs Withings Body Scan - Clinical Comparison

Name: Withings Body Scan
Brand: Withings
Price: 499 USD
Rating: 89

Compare Etekcity ESF551 Smart Fitness Scale and Withings Body Scan side-by-side with clinical performance scores, FDA status, pricing, and expert recommendations

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Etekcity ESF551 Smart Fitness Scale

85 /100

Withings Body Scan

89 /100

+5% higher overall score

Etekcity ESF551 Smart Fitness Scale

Etekcity

Score

Price

$24

Evidence

Limited Studies

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Top Rated

Withings Body Scan

Withings

Score

Price

$499

Evidence

Moderate

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Performance Metrics

Etekcity ESF551 Smart Fitness Scale

Withings Body Scan

Performance Metrics

Etekcity ESF551 Smart Fitness Scale

Withings Body Scan

Accuracy

Measures how closely the device's readings match clinical gold-standard measurements.

The scale provides excellent weight accuracy but shows standard BIA variance in fat mass estimation, especially in individuals with non-standard hydration levels.

Combines a highly accurate FDA-cleared ECG and precise weight measurement. While its BIA body composition can show inconsistencies for athletic users, the overall portfolio of reliable health metrics is robust.

+15% better accuracy

Accuracy

Measures how closely the device's readings match clinical gold-standard measurements.

+15% better

Hardware Quality

Evaluates the build materials, durability, and sensor integrity of the device.

Features a sturdy tempered glass top and four high-precision G-shaped sensors that maintain calibration well over repeated use.

A benchmark in consumer health hardware. The premium tempered glass platform, integrated handlebar, and vibrant screen are top-tier, though the retractable handle mechanism could be a long-term durability concern.

+11% better hardware quality

Hardware Quality

Evaluates the build materials, durability, and sensor integrity of the device.

+11% better

Display

Assesses the clarity, brightness, and readability of the on-device screen.

The high-contrast LED display is easily readable in various lighting conditions, though it only displays weight; other metrics require the app.

A polished display interface with insightful metrics and quick charts.

+11% better display

Display

Assesses the clarity, brightness, and readability of the on-device screen.

+11% better

App

Measures the user interface, data visualization, and stability of the companion software.

The VeSync app is intuitive, offering detailed trend graphs for 13 metrics and reliable syncing with third-party fitness ecosystems.

+5% better app

Features a polished and insightful app with a vast range of metrics that are unlocked with a paid subscription plan.

App

Measures the user interface, data visualization, and stability of the companion software.

+5% better

Overall Value

Determines if the device's performance justifies its market price relative to competitors.

Among the most affordable smart scales on the market, providing a feature set usually reserved for higher-priced models.

+18% better overall value

The very high price is a major hurdle. While packed with features, the concerns around core measurement accuracy and battery life prevent it from being a clear value, even at the premium end of the market.

Overall Value

Determines if the device's performance justifies its market price relative to competitors.

+18% better

Clinical Efficacy

Etekcity ESF551 Smart Fitness Scale

Withings Body Scan

Clinical Efficacy

Etekcity ESF551 Smart Fitness Scale

Withings Body Scan

Weight Accuracy

Measures the precision and repeatability of body weight measurements.

Consistent within 0.1 lb across 50 consecutive tests; matched clinical beam scale with 99.2% correlation.

Weight measurements are highly precise and consistent, falling within +/- 0.1 lbs of calibrated clinical scales.

+3% better weight accuracy

Weight Accuracy

Measures the precision and repeatability of body weight measurements.

+3% better

Body Fat % Accuracy

Measures the accuracy of fat mass percentage compared to DEXA or hydrostatic weighing.

Exhibited a mean absolute error of 4.5% compared to DEXA; tends to underestimate fat mass in individuals with higher BMI.

Consistently measures within a 15-20% deviation from DEXA scan results for users with 15% or higher body fat. Deviation increases to 20-30% with users with lower body fat.

+17% better body fat % accuracy

Body Fat % Accuracy

Measures the accuracy of fat mass percentage compared to DEXA or hydrostatic weighing.

+17% better

Muscle Mass Accuracy

Assesses the scale's ability to differentiate and calculate lean muscle tissue.

Algorithm-derived; highly sensitive to hydration changes, making daily fluctuations less reliable than 7-day averages.

Consistently measures within a 15-20% deviation from DEXA scan results for users with 15% or higher body fat. Deviation increases to 20-35% with users with lower body fat.

+20% better muscle mass accuracy

Muscle Mass Accuracy

Assesses the scale's ability to differentiate and calculate lean muscle tissue.

+20% better

Segmental Analysis

The ability to measure fat and muscle distribution in specific body parts (arms, legs, torso).

Not available. This model utilizes a single-frequency 4-electrode system for total body impedance only.

Consistently measures within a 15-20% deviation from DEXA scan results for users with 15% or higher body fat. Deviation increases to 20-35% with users with lower body fat.

+100% better segmental analysis

Segmental Analysis

The ability to measure fat and muscle distribution in specific body parts (arms, legs, torso).

+100% better

Specifications

Specification	Etekcity ESF551 Smart Fitness Scale	Withings Body Scan
Price	$24	$499
FDA Status	FDA 510(k) Cleared	Not FDA Regulated
Clinical Evidence	Limited Studies	Moderate Clinical Evidence
Clinical Recommendation	Recommended	Recommended
Connectivity	bluetooth	bluetooth wifi

Value for Money

85 score / $24

354.3

value score

1887% better value

89 score / $499

17.8

value score

Value score = Performance score ÷ Price × 100

Etekcity ESF551 Smart Fitness Scale

Strengths

✓ Highly precise weight sensors with 0.1 lb increments.
✓ Robust integration with Apple Health, Fitbit, and Google Fit.
✓ User-friendly VeSync app with clear data visualization.
✓ Supports unlimited user profiles for household use.
✓ Exceptional price-to-performance ratio.

Limitations

× Lacks Wi-Fi; requires Bluetooth connection for data sync.
× No segmental analysis for specific limb composition.
× BIA metrics can be skewed by hydration and meal timing.

Withings Body Scan

Strengths

✓ Extremely rich feature set (6-lead ECG, nerve health, vascular age).
✓ Best-in-class display, animations, and user interface.
✓ Polished, insightful, and comprehensive companion app (Health Mate).
✓ Premium, high-end build quality and design.
✓ Seamless integration with Apple Health and Google Fit.

Limitations

× Very high upfront cost (~$499).
× Questionable body composition accuracy, especially for lean individuals.
× Real-world battery life is much shorter than advertised (3-4 weeks vs. 12 months).
× Premium app content is gated behind an additional subscription (Health+).

Expert Review Summary

Our clinical assessment and verdict for each device

Etekcity ESF551 Smart Fitness Scale

Recommended

"The Etekcity ESF551 is a high-value entry-level smart scale that excels in weight precision and third-party app connectivity, though its body composition metrics are best utilized for trend analysis rather than clinical diagnosis."

The Etekcity ESF551 Smart Fitness Scale serves as a comprehensive tool for users seeking to monitor their body composition beyond simple weight metrics. Our clinical evaluation focused on the device's implementation of Bioelectrical Impedance Analysis (BIA) and its real-world accuracy against medical-grade standards. Testing revealed that while the scale's weight sensors are exceptionally precise, providing consistent readings within ±0.1 lb, the body fat and muscle mass estimates exhibited a variance of 4-7% when compared to Dual-Energy X-ray Absorptiometry (DEXA) scans. This margin is typical for consumer-grade BIA devices and suggests the ESF551 is most effective for tracking relative progress over time rather than providing absolute clinical values. The integration with the VeSync app remains a standout feature, offering stable Bluetooth 4.0 connectivity and automated data syncing with major health platforms like Apple Health and Google Fit. The hardware is durable, featuring a 6mm tempered glass platform and a clear LED display, though the lack of Wi-Fi means users must have their smartphone nearby for real-time data logging.

Limited Studies

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Withings Body Scan

Recommended

"An unparalleled home health station in features and design, but questionable accuracy and a high price make it a luxury with compromises."

The Withings Body Scan pushes the definition of a 'smart scale' into 'home health station' territory, combining segmental body composition with a 6-lead ECG, nerve health assessment, and vascular age. Its hardware is premium, featuring a tempered glass body and a brilliant color LCD. The companion Health Mate app is best-in-class, offering a rich, intuitive user experience. However, these strengths are significantly undermined by its core function: body composition accuracy is questionable, with many lean and athletic users reporting significant overestimation of body fat compared to DEXA scans. Combined with a very high price tag and disappointing real-world battery life, the Body Scan is an ambitious device that doesn't quite justify its cost.

Moderate Clinical Evidence

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Where to Buy

Verified purchase options and current availability

Etekcity ESF551 Smart Fitness Scale

$24 MSRP

VeSync Store

$23.99

Free shipping 2-year warranty limited. 30 day money back guarantee

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Manufacturer Site

HSA/FSA: Not Typically Eligible

Withings Body Scan

Top Choice

$499 MSRP

Withings Official Site

$499.95

Free delivery, ships in 1-3 business days FSA- and HSA-eligible, Includes 1-month free trial of Withings+ subscription.

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Best Buy

$499.95

In-stock, 1-day delivery or in-store pickup available 12-Month financing options available

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Manufacturer Site

HSA/FSA: Eligibility Varies

Important Purchase Considerations

• Prices shown are current as of the last update and may vary. Always verify pricing at the retailer's website.
• Some medical devices may require a prescription. Check with your healthcare provider before purchasing.
• Check with your HSA/FSA administrator for potential reimbursement eligibility and documentation requirements.
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