For accurate heart rhythm measurements with Frontier Pulse, follow these tips: - Ensure you are seated comfortably with your arms resting on a stable surface to avoid any unnecessary movement during the measurement. - Lightly place your finger on the camera lens without applying excessive pressure. A gentle touch ensures the best possible signal. - Remove any protective case from your smartphone as it might interfere with the camera's ability to accurately detect your heartbeat. - Make sure your finger covers the lens completely but does not touch the flashlight to avoid overheating and potential discomfort. - In cases where your smartphone has more than one camera, use the instructions provided within the app to identify which lens should be used for measurements. Adhering to these guidelines will help ensure that your measurements are both accurate and consistent.