I have taken regular, consistent, and accurate measurements with this app since 2012. It stores a history of your measurements, with time and date stamps, and it can store a history for more than one person. The interface is nicely done. This app, just as other cardio apps on the App Store, measures your pulse, not your heart rate, so you can easily verify the accuracy of the measurements manually. When taking a measurement in the beginning, put the iPad/iPhone on a stable surface in a well-lit area, rest your arm on a surface, and the measurements will be reliable. After using it for some time, I can take accurate measurements in a most conditions. I hope the app will soon be updated to integrate with Apples health app. Currently it has only a very limited export function of a single measurement. Better analysis of the collected data is missing.