Comparison

Withings vs OBSERV 520

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Withings

This app serves as a central hub for managing your health, consolidating data from various devices and apps. It provides insights, educational content, and tools to track progress towards goals like weight loss, activity, and sleep. Share your health data securely with your doctor for informed medical decisions.

Highlights
  • Unified health data from devices and apps
  • Weight and body composition monitoring
  • Activity and sleep tracking
  • Blood pressure and cardiovascular health
  • Personalized health insights and coaching
  • Family health profiles
  • Doctor-shareable health reports
Features
Read full description

Whatever your goal—weight loss, activity, blood pressure management, or better sleep—the Withings App is your gateway to health management, offering education, insights, and a seamless way to stay connected. Built on clinical expertise, it unifies your health data to drive smarter decisions and lasting results. YOUR HEALTH ECOSYSTEM, SEAMLESSLY CONNECTED Easily install all your Withings devices and sync your data to bring your health universe together. ALL YOUR HEALTH APPS UNIFIED Connect your health apps like Apple Health, Strava, MyFitnessPal, and more to centralize your data with ease. TRUST MEDICAL-GRADE PRECISION, TO DRIVE PROGRESS Clinical-grade accuracy delivers reliable insights that help you make confident, informed decisions about your health. • WEIGHT & BODY COMPOSITION MONITORING • ACTIVITY MONITORING • SLEEP SCORE • HYPERTENSION MANAGEMENT • CARDIOVASCULAR DISEASE DETECTION • MENSTRUAL CYCLE TRACKING • NUTRITION TRACKING " SHAPE YOUR HEALTH JOURNEY Create a tailored health profile, monitor symptoms, and set achievable goals to better understand your body, stay motivated, and improve your health over time MULTIPLE PROFILES TO TRACK FAMILY HEALTH Track the health of your entire household from one app and easily share data between profiles for a more connected approach to care. INSTANTLY SHARE WITH YOUR DOCTOR Generate secure, shareable reports or send a live link to your health dashboard, giving your healthcare provider immediate access to your most up-to-date metrics. Withings+ POWERING YOUR JOURNEY TO LONGEVITY Precision health made personal—AI and in-app cardiologists guiding you forward. With Withings+, our premium subscription service, you decode your health through clinical reviews and AI assessments, delivering precise, tailored care to strengthen long-term habits and help support your journey toward a better, longer life. YOUR HEALTH SIMPLIFIED All metrics consolidated in one powerful Health Improvement Score to guide your long-term health. SPECIALIST CARE AT YOUR FINGERTIPS Get your ECG reviewed by a cardiologist within 24 hours — with an average wait time of just 4 hours (Observed Jan–Mar 2025). Feel confident knowing your heart health is in expert hands, quickly and reliably. DECODE YOUR BODY With Withings Intelligence, experience around-the-clock AI-driven insights, smart trend analysis, and personalized coaching to help you take control of your health. Kickstart your day with our brand new Vitalité Indicator. This powerful tool brings together key health metrics—including HRV, temperature, sleep patterns, and more — to evaluate your rest and effort levels. Based on these insights, it offers personalized suggestions to help you boost your energy and optimize recovery for the days ahead. You’ll also receive a detailed breakdown that can highlight early signs of potential illness and signal when it’s time to give yourself extra care. YOUR WEEKLY HEALTH BREAKDOWN Track your strengths and weaknesses each week to refine and boost your Health Improvement Score. ABOUT WITHINGS ​​Withings creates clinically validated health devices embedded in beautifully designed, easy-to-use products. A universe of insights all synced to a single source of truth, providing you with the ultimate way to stay connected to your health. Terms of use:https://www.withings.com/legal/applications-conditions#/legal/services-terms-and-conditions Privacy policy: https://www.withings.com/legal/applications-conditions#/legal/privacy-policy Medical compliance: https://www.withings.com/eu/en/compliance?srsltid=AfmBOoovZiYectAmYJC5gs2HhHrMxHAhPdN4NFQQI5RSImnQdrLoxKSc

About

OBSERV 520

This professional skin analysis tool uses an iPad and specialized device to visualize skin conditions not visible to the naked eye. It aids in diagnosing, planning treatments, and advising clients on personalized skincare and product recommendations. The app allows for easy capture and comparison of before-and-after images to monitor treatment progress.

Highlights
  • Full-face skin analysis
  • Epidermal and dermal layer diagnosis
  • Targeted treatment planning
  • Personalized product advice
  • Live visualization of skin conditions
  • Before and after image monitoring
  • Multiple light modes (Daylight, Wood's/UV/Cross/Parallel Polarization)
Read full description

OBSERV® 520 Professional skin analysis The OBSERV® 520 is the ultimate full-face skin analyzing device. It can be used widely from cosmetic development and evaluation, professional skin care advice, aesthetic treatment planning, self-assessment to communication and marketing. OBSERV® Professional full-face skin analysis with the iPad Using the OBSERV® 520 in combination with an iPad provides you with an accurate tool to diagnose your client's skin conditions at both epidermal and dermal layer. The different analysis modes offer you clear, sharp and detailed views of the facial skin and assist you in making a targeted treatment plan and/or giving personalized product advice in full confidence. Seeing is believing Using this App, your iPad and the OBSERV® 520 allows you to make a live visualization of your clients’ skin conditions that are not visible to the naked eye and hence often unknown. By visualizing this you can make your clients aware of skin concerns that are developing in the deeper layers of the skin but that haven’t yet surfaced and propose preventive treatment options. Monitoring treatment progress Shot a picture session in just 30 seconds and thanks to the App, store and retrieve the pictures of your clients of the current and past sessions. Reproduce perfectly aligned before and after pictures supporting you in monitoring facial appearance changes and the progress of your treatment plans. Easy-to-use App controls The App controls the OBSERV® 520 via Bluetooth 4.0 and offers you the possibility to switch between the different light modes at any time during your skin consultation. The daylight illumination mode option allows you and your client to observe how identified skin conditions manifest themselves in the daylight. By switching between the Wood's/UV/Cross/Parallel Polarization modes, the manifestation of skin conditions can be studied in great detail. Thereby you can modify the build-up of the spectral components and enhance the appearance of particular skin conditions. In the automatic mode, the system acquires sequentially all the images for a complete skin analysis session. Each of these picture sessions can be stored in the client database and can be retrieved later for comparison and evaluation.

Screenshots

Withings4 screens

Verdict

The call

The clearest difference is rating: Withings at 4.6 against OBSERV 520's 3.0. Withings also leads on update cadence (fortnightly vs every 4 months) and ratings volume (366K vs 1). OBSERV 520's advantage is in-app purchases (none vs 3) and iOS requirement (12.0 vs 18.0). On price, review sentiment and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Withings sells 3 in-app purchases, starting at $9.99 per month. OBSERV 520 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Withings holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Withings has 366K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 25% of Withings's written reviews are positive against 33% of OBSERV 520's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Withings ships an update fortnightly, OBSERV 520 every 4 months. The most recent releases landed on September 29, 2026 and June 4, 2026 respectively.

Scorecard8 real differences · 3 level
Withings versus OBSERV 520: the parameters behind the verdict, then further details
ParameterWithingsOBSERV 520
PriceFreeFree
Rating4.6 (366K ratings) — better3.0 (1 ratings)
Positive reviews25.4% of reviews33.3% of reviews — better
Number of ratings366K — better1
Update frequencyFortnightly — betterEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#70 — better—
DevicesiPhone, iPad, Apple Watch — betteriPad
Requires iOS18.012.0 — better
Further details — not scored
Size445 MB48 MB
Age rating4+4+
DeveloperWithingsInnoFaith beauty sciences B.V.

Customer experience

Withings

All ratings365,738 ratings
Positive90.1%
Neutral3.4%
Negative6.5%
Written reviews5,802 reviews
Positive25.4%
Neutral9.6%
Negative65.0%

OBSERV 520

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews3 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

Bugs and requests

Withings

Reported bugs

4 issues
  • Inconsistent weight data reporting
  • App crashes or freezes on launch
  • Inaccurate body composition measurements
  • Unreliable blood pressure readings

Requested features

4 requests
  • Improved sleep tracking and reporting
  • More granular data visualization
  • Ability to manually edit or delete measurements
  • Better integration with third-party apps

OBSERV 520

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Withings

Subscriptions2
  • Withings+ Monthly offer14 Days trial$9.991 Month
  • Withings+ Annual offer14 Days trial$99.991 Year
One-time1
  • ECGs Cardiologist Review$59.99
None

OBSERV 520

No in-app purchases

Questions

Is Withings free?
Withings is free to download, with in-app purchases available.
Is OBSERV 520 free?
OBSERV 520 is free to download, with no in-app purchases.
Which has better reviews, Withings or OBSERV 520?
Withings is rated higher. Withings averages 4.6 out of 5 from 366K ratings, while OBSERV 520 averages 3.0 from 1 ratings.
Do Withings or OBSERV 520 have ads?
Neither Withings nor OBSERV 520 shows ads.
Which is updated more often, Withings or OBSERV 520?
Withings ships an update fortnightly, and OBSERV 520 every 4 months. Most recently, Withings was updated on September 29, 2026 and OBSERV 520 on June 4, 2026.

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