Hemio: pulse and oxygen estimates with your camera, in about 30 seconds.
A free app that estimates pulse and oxygen (SpO2) using the camera image. No account, no cloud. History stays on your device and we cannot access it. Results are informative only and not medical measurements.
How it works
Three simple steps for pulse and oxygen (SpO2) estimates.
Open the app
Allow camera and flash access so the app can capture the optical signal.
Place your finger
Cover the camera, keep your hand steady, and breathe normally.
Get your estimate
Hemio estimates pulse and SpO2 and displays them in seconds.
Clear benefits, no friction
Built for speed, simplicity, and privacy.
Free and no account
Start instantly with no login or subscription.
Local processing
On-device analysis only. No backend, no cloud, no server database.
Local history and charts
Readings are stored locally to show trends over time.
Pulse + SpO2
Quick estimates using the phone camera.
Works offline
No internet needed for measurements.
Camera + flash
Uses camera and flash for more stable readings.
Local history and trend chart
Your readings stay on your phone. We do not upload them and we cannot access them.
App screenshots
Example screens for measurement and local history.
Important
Hemio is not a medical device and does not provide diagnosis. Pulse and oxygen (SpO2) estimates are informational and can vary based on finger placement, lighting, and hand stability. We do not guarantee accuracy. For medical decisions, consult a professional.
Quick facts for clarity and search
Concise information for users and search engines.
FAQ
Short, clear answers.
Is Hemio a medical device?
No. Hemio provides informational estimates for pulse and SpO2 and does not replace medical care.
Does it measure oxygen (SpO2)?
Yes. The app estimates pulse and oxygen (SpO2) using the camera.
Where is history stored?
Locally on your device. We do not store data in our databases or the cloud.
Do I need an account?
No. The app works without login or registration.
Why do results vary?
Accuracy depends on finger placement, lighting, camera quality, and hand stability.
Can I use the app offline?
Yes. Pulse and SpO2 measurements do not require internet.
Start now, free
Estimate pulse and SpO2 fast, with no account and no cloud. Try Hemio today.