Cardiio: Heart Rate Monitor – Measure your pulse with your iPhone camera

Cardiio is a free iOS app that allows you to measure your heart rate using your iPhone camera. By covering the back camera with your finger, the app can calculate your pulse and provide insights on how it relates to your fitness and endurance. The app also offers built-in high-intensity circuit training exercises that take only seven minutes to complete. With a personal dashboard that tracks your progress and history, you can save, edit, annotate, and export your data in CSV format. The app also integrates with the Apple Health app to save your heart rate measurements.

Cardiio‘s technology is based on the fact that blood absorbs light, and every time your heart beats, the blood flow to your finger increases, causing more light to be absorbed. By capturing tiny changes in reflected light, the app can calculate your heart rate. However, the app is not intended for medical use and should not be used to diagnose, prevent, or treat any condition.

Cardiio has been featured on CBS’s The Doctors and ABC News, and has received positive reviews from publications such as PC Magazine, Cult of Mac, and Lifehacker. Upgrade to the PRO version to enjoy all the features of the app.