Here are some tips and tricks for free app users to help you measure your heart rate successfully using your smartphone camera in the Morning Check-in:

‍Before the measurement starts, you will see the image from the relevant camera on your phone's screen. If the image is bright red, you are good to go. If the screen shows your surroundings, your finger is on the wrong camera.

This may take trial and error, especially if your phone has multiple cameras. Try putting your finger on each camera one by one until you see a red circle.

‍If possible, cover both your camera lens and flash using your finger. In some phones, particularly newer Google Pixels, the camera is placed far from the flash. In these cases, we may not be able to capture a bright enough image to measure accurately. We are working on improving this, but in the meantime, you can try illuminating your fingertip with an alternative light source such as a lamp or flashlight.

‍If your fingers are too cold, the blood flow in your fingertips may be reduced. We recommend warming your fingers before measuring to get the best quality reading.

‍Moving around while measuring reduces the quality of the reading. This is because our algorithm interprets movement as changes in your heartbeat, which can cause confusion. We recommend staying as still as possible while measuring.

Try to place your finger lightly on the camera lens for the most reliable readings.

‍We have not been able to test Visible with every smartphone (there are thousands of them!). Therefore, even if you follow the advice above, you may still experience issues. If that happens, you can chat with us here, and we will do our best to help.