Check your blood pressure with a face scan

Yes, Face Scan in the Cardilog app gives you an estimate. It uses your phone's front camera to read the tiny colour changes in your skin as blood moves through your face, and from that it estimates your blood pressure, pulse, heart rate variability and breathing rate in about 30 seconds. The app marks every result as an estimate, and a cuff reading is still the measurement, so use a cuff for anything you or your doctor will act on.

Face Scan gives you an estimate, and the app marks every result as one. How close it comes depends on the scan itself: even light on your face, a steady phone and keeping still all help, and the result screen shows a measurement conditions percentage so you know how good the scan was. Calibrating Face Scan against your own cuff adjusts your scans to match your monitor. For any reading you or your doctor will act on, take it with a cuff, because the cuff is the measurement and the scan is an estimate alongside it. Face Scan is a wellness feature and not a medical device.

Yes. A cuff reading is the measurement to rely on, and Face Scan gives you an estimate between cuff readings. You also need a cuff to calibrate Face Scan, which takes four cuff readings and three scans. If a scan estimate looks unusual, take a cuff reading before you do anything about it, and talk to your doctor about any reading that worries you. Never change or stop a medication because of a scan estimate.

No. Face Scan is a wellness feature and not a medical device, and the US Food and Drug Administration (FDA) has not cleared it. In September 2025 the FDA warned against relying on blood pressure devices and features it has not authorized when your care depends on an accurate reading. That is why the app marks every scan as an estimate and why your cuff stays the measurement: use a validated upper-arm cuff for any reading you or your doctor will act on.

Yes, for keeping an eye on your numbers between cuff readings. A scan takes about 30 seconds and needs nothing but your phone, so it is easy to check at the same times each day and watch how your estimates move. Calibrate it against your own cuff first, and take a cuff reading for anything you or your doctor will act on, or whenever a scan looks unusual.

No. Face Scan is part of Cardilog Pro, a paid subscription sold through the App Store and Google Play, and there are no free scans. Logging, charts, reminders, PDF reports and your full history stay free. If you have an older Cardilog Pro plan, you need to move to the new plan to use Face Scan.

Face Scan works on iPhone and iPad with iOS 16.4 or later, and on Android phones with Android 8 or later and a 64-bit processor. A phone that cannot run it shows the message "This device can't run the camera scan" when you open Face Scan, and everything else in the app keeps working.

No. The scan reads the live pictures from the front camera, keeps only the colour signal it needs and does all of that on your phone. Cardilog takes no photo and no video, saves no picture of your face and sends nothing from the camera anywhere. You agree to the scan with a tick box before your first one, and you can withdraw that agreement at any time in Settings.

Open Settings in the Cardilog app and tap Face Scan calibration, or say yes when the app offers it before a scan. Sit down with your own cuff and allow 5 to 10 minutes. The app asks for four cuff readings and three face scans, one after the other, and from then on your scans are adjusted to match your monitor. The calibration is saved to your account.

Yes. Every scan shows four estimates: blood pressure marked Est., pulse in beats per minute, heart rate variability as SDNN in milliseconds, and breathing rate in breaths per minute. When you save a scan, Cardilog keeps the blood pressure and pulse in your history as a scan estimate.