This article shows in detail the steps to carry out the realization of a system for monitoring heart rate. This system is developed using a wristband Global Mio company known as Mio Link, to take the data that is sent via Bluetooth communication to a Smartphone device with pre-installed application, it is responsible for keeping managing a database with the values taken, plot them, compared with normalized heart rate values and send an alarm via text message reporting any abnormality, also send the database with a e-mail.