If your smartphone has multiple camera lenses, follow the steps shown below to find the right camera lens to perform a proper measurement:
STEP 1: Tap on 'Start measurement'.
- If you see the screen that says 'Prepare', go through the steps until you're at the 'Find your camera' screen.
- If you see the screen that says 'Place your finger gently on the rear camera and relax', tap on 'Remind me how it works' and follow the steps until you're at the 'Find your camera' screen.
STEP 3: On this screen you can see a circle that shows what the camera you should use, sees. When you cover the right camera with your finger, the circle will turn dark/red. (When you have placed your finger on another camera, the circle will show your surroundings. This means that this is not the right camera to perform a measurement with.)
STEP 4: When you have found the right camera, you can start to measure your heart rhythm.
Tip: Do not cover up the flash with your finger. The flash can get hot during the measurement.