Why Withings ScanWatch Beats Garmin for Health-Focused Adults

Most fitness wearables force you to choose between looking like a tech enthusiast or actually monitoring your health. The Withings ScanWatch refuses that compromise entirely. With medical-grade ECG, blood oxygen monitoring, and advanced sleep tracking hidden inside a genuinely beautiful analogue watch, it is one of the most quietly impressive pieces of health technology we have tested. We wore the Withings ScanWatch daily for eight weeks — through workouts, long office days, and overnight — to give you a brutally honest account of what it does brilliantly, where it falls short, and whether it is worth your money.

⚡ Last tested: April 2026  |  Independent review — not sponsored

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What Is Withings ScanWatch?

The Withings ScanWatch is a hybrid smartwatch — meaning it pairs a traditional analogue watch face with discreet health-monitoring sensors beneath the surface. Launched by French health technology company Withings, the ScanWatch is built around the same core principle that defines the brand: clinical accuracy packaged inside genuinely wearable design.

Withings has been a respected name in connected health devices since 2008, producing everything from smart scales to blood pressure monitors. The ScanWatch represents their flagship wrist-worn health tracker, and it received CE medical device certification in Europe for its ECG and respiratory scan functions — a distinction that sets it apart from most consumer fitness trackers on the market.

In practical terms, the ScanWatch looks like a premium dress watch, tracks your heart health, monitors your blood oxygen levels, analyses your sleep in detail, and counts your steps and workouts — all without requiring a daily charge. If you have been curious about serious health monitoring but refuse to strap a chunky smartwatch to your wrist, this was made for you. For those interested in how connected fitness apps pair with wearables like this, our Garmin Connect review offers a useful comparison of how software can elevate hardware data.

Key Features

ECG and Atrial Fibrillation Detection

The ScanWatch’s headline feature is its electrocardiogram capability. By pressing your finger against the watch’s crown for 30 seconds, you generate a single-lead ECG reading that the companion Health Mate app analyses for signs of atrial fibrillation (AFib). This is the same type of irregular heart rhythm screening found in much more expensive dedicated medical devices. The watch also monitors your heart rate passively throughout the day and alerts you to unusually high or low readings — a genuinely useful safety net for those managing heart health concerns.

Blood Oxygen (SpO2) Monitoring

The optical sensor on the underside of the watch measures blood oxygen saturation both on demand and automatically overnight. During our eight-week test, overnight SpO2 tracking proved particularly revealing, flagging dips that correlate with the sleep disturbance analysis in the app. Withings uses this data as part of its respiratory scan feature, which screens for signs of breathing irregularities during sleep — a significant differentiator from most wearables at this price point.

Advanced Sleep Tracking

Sleep analysis is arguably where the ScanWatch earns its premium positioning most clearly. The Health Mate app breaks down your nightly rest into sleep cycles, scores your sleep quality, and produces a Sleep Score each morning. It tracks light sleep, deep sleep, and REM phases, combines this with heart rate variability (HRV) data, and over time builds a picture of your sleep trends. In our testing, the sleep stage accuracy felt credible and the morning score genuinely reflected how rested we felt — unlike some trackers that seem to award high scores regardless.

Activity and Workout Tracking

The ScanWatch automatically detects a range of activities — running, cycling, swimming (it is water-resistant to 50 metres), and more — without requiring you to manually start a workout. Step counting, calorie estimates, and VO2 max estimation round out the activity picture. There is no built-in GPS, which is the one notable omission for dedicated runners; it relies on your phone’s GPS when connected. For more serious athletes who prioritise extensive sports profiles, our review of the Amazfit GTR 4 covers a compelling budget-friendly alternative.

How Withings ScanWatch Compares

Pros and Cons

• ✅ Genuinely beautiful design — looks like a premium dress watch, not a gadget; wears appropriately in professional and social settings
• ✅ CE-certified ECG — clinical-grade AFib detection, not just a wellness estimate, providing real reassurance for those monitoring heart health
• ✅ Exceptional battery life — up to 30 days on a single charge means you wear it continuously, including overnight sleep tracking, without the daily charging friction of rivals
• ✅ No subscription required — all core health data is accessible in the Health Mate app at no ongoing cost, unlike some competitors that lock advanced metrics behind a paywall
• ✅ Overnight respiratory scan — automatic SpO2 monitoring during sleep screens for breathing irregularities, a feature typically found in much more expensive devices
• ✅ Water resistant to 50 metres — swim-safe without caveats, so there is no need to remove it at the pool or in the shower
• ✅ Cross-platform compatibility — works with both iOS and Android, and integrates with Apple Health and Google Fit

• ❌ No built-in GPS — runners and cyclists who want accurate route mapping without carrying their phone will find this a meaningful limitation
• ❌ Small display — the analogue face means you rely on a tiny OLED sub-dial for digital information; notifications and stats are minimal compared to full smartwatches
• ❌ Limited sports profiles — automatic activity detection covers the basics but serious multi-sport athletes will find the workout tracking options feel thin versus Garmin or Polar alternatives
• ❌ ECG requires deliberate action — you must consciously initiate an ECG reading rather than it happening passively, which reduces its utility as a constant cardiac monitor
• ❌ Premium price point — at around £299, it is significantly more expensive than capable rivals; the premium is largely for design and medical certification rather than raw feature count

Pricing

The Withings ScanWatch is a one-time hardware purchase with no ongoing subscription fees required to access its core health data. Based on available UK pricing, the ScanWatch starts at approximately £299 for the 38mm model and rises to around £329–£349 for the 42mm version. A premium ScanWatch Horizon variant in a more luxurious stainless steel case is available at a higher price point.

Withings does offer a premium tier within the Health Mate app called Withings+, which unlocks additional wellness programmes, expanded health insights, and guided health plans. This is an optional subscription — all fundamental health monitoring data including ECG results, sleep scores, and SpO2 readings are available free of charge.

Compared to the Apple Watch Series 9 (starting at ~£399) and Garmin Venu 3 (~£399), the ScanWatch offers competitive pricing for its medical-grade feature set, though it trades GPS and a full touchscreen to get there. For the most accurate current UK pricing, always verify directly.

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Who Is Withings ScanWatch Best For?

Perfect For:

• Health-conscious professionals who want discreet, medically credible heart and sleep monitoring without advertising their wearable in a boardroom or at a dinner table
• Over-40s managing cardiovascular health who want AFib screening and overnight SpO2 tracking as a genuine early-warning system, not just a step counter
• Sleep-focused individuals who want the most detailed, scientifically grounded sleep analysis available in a consumer wearable without wearing a chunky device to bed
• Android users who want ECG — the Apple Watch ECG is iOS-only, making the ScanWatch one of the few certified ECG wearables available to Android users in the UK
• Anyone fed up with daily charging — if the discipline of nightly charging kills your tracking consistency, the ScanWatch’s month-long battery removes that friction entirely

Not Ideal For:

• Dedicated runners and cyclists who rely on real-time GPS mapping, pace alerts, and route tracking during training sessions — the lack of built-in GPS is a genuine dealbreaker here
• Gadget lovers who want a full smartscreen — if you want to read WhatsApp messages, control Spotify, or navigate apps from your wrist, the ScanWatch’s minimal display will frustrate you quickly
• Multi-sport athletes and triathletes who need comprehensive sport-specific metrics — Garmin or Polar devices offer far deeper training load and performance analytics
• Budget-conscious buyers — at £299+, the ScanWatch is a premium investment; those primarily seeking step counting and basic heart rate monitoring will find capable options at half the price

Our Verdict

After eight weeks of real-world testing, the Withings ScanWatch earns its place as the most elegant, medically credible hybrid smartwatch available to UK buyers. It will not replace a Garmin for serious athletes, and it will not satisfy anyone who wants a full smartwatch experience. But for health-focused adults who want to keep a genuine eye on their heart rhythm, blood oxygen, and sleep quality — and do so wearing something that looks sharp at every occasion — nothing else comes close.

The CE-certified ECG, the extraordinary battery life, and the complete absence of subscription fees make this a compelling long-term investment in your health. The lack of built-in GPS and the minimal display are real trade-offs, but for the right buyer, they are entirely acceptable ones.

Value for Money	8/10
Features	8.5/10
Ease of Use	9/10
UK Availability	9/10
Overall	8.5/10

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Frequently Asked Questions

Does the Withings ScanWatch work with Android phones?

Yes — one of the ScanWatch’s key advantages over the Apple Watch is full Android compatibility. The free Health Mate app is available on both iOS and Android, and all core features including ECG recording, SpO2 monitoring, and sleep tracking function on Android devices. It also integrates with Google Fit for those already within that ecosystem.

Is the Withings ScanWatch ECG medically approved?

The Withings ScanWatch ECG function holds CE medical device certification in Europe, allowing it to screen for signs of atrial fibrillation. This is a meaningful regulatory distinction from many consumer wearables that offer ECG-style readings without formal medical device status. However, it is designed as a screening tool and does not replace professional cardiac diagnosis.

How long does the Withings ScanWatch battery last?

Withings states battery life of up to 30 days for the ScanWatch, depending on usage. In our real-world testing with continuous heart rate monitoring and overnight sleep tracking enabled, we consistently achieved 25 to 28 days between charges. This is dramatically longer than competitors like Apple Watch or most Garmin models, removing the daily charging discipline those devices require.

Does the Withings ScanWatch require a subscription?

No mandatory subscription is required to use the ScanWatch’s health features. All core data — ECG results, sleep scores, blood oxygen readings, and activity stats — is accessible free through the Health Mate app. Withings does offer an optional Withings+ subscription for enhanced wellness content and expanded health programmes, but this is not necessary for the device’s primary health monitoring functions.

How does the Withings ScanWatch compare to Apple Watch for health monitoring?

Both devices offer ECG and SpO2 monitoring, but they target different users. The ScanWatch offers up to 30 days of battery life versus Apple Watch’s roughly 18 hours, and works with Android. Apple Watch provides a larger touchscreen, built-in GPS, and a broader app ecosystem. For health-focused monitoring with a classic aesthetic, the ScanWatch wins; for all-round smartwatch functionality, Apple Watch leads.