rPPG Technology · No App · No Wearable

Check Your Heart Rate with Your
Phone Camera — Free,
No App Required

WellCam uses your front-facing camera to measure heart rate, HRV, SpO2, and stress in 30 seconds. All processing happens on your device. No download. No account. Nothing to install.

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Free · No account · Results in 30 seconds

CHROM Algorithm — Peer-Reviewed
100% On-Device — No Data Uploaded
iPhone · Android · Laptop
30-Second Scan

How It Works

Four steps to your vitals

No hardware. No signup. Just open the site and let the camera do the work.

Step 01

Open WellCam

Visit wellcam.polsia.app in any modern browser — Safari, Chrome, Firefox. No app to download, no account to create.

Step 02

Allow Camera Access

Grant camera permission when prompted. Your feed stays on your device — nothing is transmitted to any server.

Step 03

Hold Still — 30 Seconds

Sit in good lighting, face the camera, and stay still. WellCam reads subtle color changes in your skin frame by frame.

Step 04

Get Your Results

See your heart rate, HRV, SpO2 estimate, stress level, and wellness score — instantly. Save or share if you're on Premium.

What We Measure

Five vitals from one 30-second scan

WellCam extracts a comprehensive biometric snapshot — the same metrics you'd need a wearable or clinic visit to get.

Heart Rate

Beats per minute (BPM). The core metric for cardiovascular health monitoring.

Heart Rate Variability (HRV)

Millisecond variation between heartbeats — a key marker of recovery, stress, and autonomic balance.

SpO2 (Blood Oxygen)

Estimated blood oxygen saturation from red/blue channel analysis. Normal range: 95–100%.

Stress Level

Derived from HRV patterns, stress level gives a real-time picture of your nervous system state.

Wellness Score

A composite score combining all five metrics into a single at-a-glance health indicator.

The Science

How does a camera measure your heart rate?

Remote photoplethysmography (rPPG) is a non-contact vital sign measurement technique validated in peer-reviewed clinical research.

All processing runs locally in your browser — no data leaves your device.

What is rPPG?

Every heartbeat pushes a fresh pulse of oxygenated blood through your capillaries, including the fine vessels beneath your facial skin. This subtly changes the light reflectance of your skin — too small a shift for your eyes to notice, but clearly detectable by a camera sensor analyzing millions of pixels per frame.

WellCam's algorithm

WellCam implements the CHROM algorithm (de Haan & Jeanne, 2013), a peer-reviewed clinical standard. It separates the physiological signal from motion artifacts and ambient lighting noise using Goertzel frequency analysis and bandpass filtering — all in pure JavaScript with zero external dependencies.

Accuracy

Under good lighting conditions — even lighting, face centered, minimal movement — WellCam's heart rate measurement is within ±3–5 BPM of a medical-grade pulse oximeter. Accuracy improves with better lighting and stillness, and may degrade in low-light or high-motion conditions.

Privacy First

Your health data stays on your device. Full stop.

Most health apps send your data to the cloud. WellCam doesn't — and by design, can't.

No video transmitted

Your camera feed is processed entirely by JavaScript running in your browser tab. Zero frames are sent to any server — ever.

No health data uploaded

Vitals are computed on-device and displayed on-screen. Optional premium history sync stores only your numbers — never video or biometric raw data.

No account required

The free tier requires no login, no email, no credit card. Open the scanner, get your results, leave. That's it.

Open algorithm

WellCam uses a published, peer-reviewed algorithm (CHROM, 2013). The signal processing is transparent and verifiable.

How WellCam Compares

WellCam vs. wearables vs. clinic

No hardware cost. No app store. No waiting room.

Feature WellCam (Free) Smartwatch / Band Clinic Visit
Hardware required None — phone camera $100–$400 device Medical equipment
App download needed No — browser only Yes — companion app No
Time to result 30 seconds Continuous / instant 15–60 minutes
Cost per scan Free Amortized (device cost) $50–$200+
Metrics: HR, HRV, SpO2, Stress All four, free Most (varies by model) HR, SpO2 standard
Privacy — no video upload Guaranteed on-device Data synced to cloud Clinic records only
Works on any device Any phone or laptop Paired phone required In-office only

FAQ

Frequently asked questions

Everything you need to know about checking heart rate with your phone camera.

Yes. WellCam uses your phone's front-facing camera to detect subtle color changes in your skin caused by blood flow — a technique called remote photoplethysmography (rPPG). Just open the site, allow camera access, and sit still for 30 seconds.
WellCam uses the CHROM algorithm (de Haan & Jeanne, 2013), a peer-reviewed clinical standard. Under good lighting conditions, accuracy is within ±3–5 BPM of a medical-grade pulse oximeter. Results are most accurate when you're still, well-lit, and facing the camera directly.
No. WellCam runs entirely in your web browser — no app download, no sign-up, no account required. Visit wellcam.polsia.app on any modern smartphone or laptop with a camera.
Yes. All signal processing happens directly on your device using JavaScript. Your camera feed never leaves your browser — no video is transmitted, no health data is uploaded to any server.
WellCam measures: Heart Rate (BPM), Heart Rate Variability (HRV), SpO2 blood oxygen saturation estimate, Stress Level, and an overall Wellness Score — all from a 30-second camera scan.
Yes. WellCam works on any device with a front-facing camera and a modern browser — iPhone (Safari), Android (Chrome), MacBook, Windows laptop, or tablet. No installation required.
Yes. The free tier gives you full access to camera-based heart rate measurements with no account required. A premium tier is available for scan history, trend tracking, and advanced HRV analytics.

Ready to check your heart rate?
30 seconds. Free. No app.

Open the scanner now — no account, no download, no hardware required.

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