# Withings vs OBSERV 520

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 (368K vs 1). OBSERV 520's advantage is in-app purchases (none vs 3) and review sentiment (33% vs 24%). On price and ads there is nothing between them.

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.

Withings holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Withings has 368K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 24% 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.

Withings ships an update fortnightly, OBSERV 520 every 4 months. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Withings | OBSERV 520 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (368K ratings)](https://appshunter.io/ios/app/withings/id542701020/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/observ-520/id781554722/reviews) |
| Number of ratings | **368K** | 1 |
| Positive reviews | 24.4% of reviews | **33.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#68** | — |
| Size | 450 MB | 48 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Withings](https://appshunter.io/developer/298933045) | [InnoFaith beauty sciences](https://appshunter.io/developer/583003631) |

## What reviewers say

### Withings

[App page](https://appshunter.io/ios/app/withings/id542701020)

**Currently charting:** #68 Top Grossing · Health & Fitness (US App Store)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Withings+ Monthly offer | $9.99 | per month |
| Withings+ Annual offer | $99.99 | per year |
| ECGs Cardiologist Review | $59.99 | one-time |

**What reviewers like**

- ⭐ Excellent app and product integration
- 📊 Comprehensive health tracking
- 🔋 Good battery life on devices
- 🤝 Helpful customer support

**What reviewers complain about**

- 🐛 Connectivity and syncing issues
- 📈 Confusing or cluttered UI
- 🔍 Lack of customization options
- 💰 Expensive for some features

**Reported bugs**

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

**Requested features**

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


### OBSERV 520

[App page](https://appshunter.io/ios/app/observ-520/id781554722)

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)

**In-app purchases:** none


## Frequently asked 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 368K 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 October 21, 2026 and OBSERV 520 on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*