Cell phones have evolved in recent years, becoming more intelligent and diversifying their use. They have become a mechanism for information, to be connection to the outside world, for entertainment, study, and work. In 2018 around 38% of the global population had at least one smartphone. In addition, the incorporation of sensors allows the development of more personalized applications. Thus, applications associated with rehabilitation have emerged, helping people to improve adherence and complete their therapies. This work proposes the use of a mobile application capable of accessing accelerometer information, and eventually gyroscope and magnetometer, for the execution of three basic rehabilitation exercises for carpal tunnel syndrome (CTS). In a first attempt, the application was evaluated with 3 patients through the VAS (Visual Analog Scale) pain test and answer a survey to measure the impact of the therapy on their quality of life. The results of the pilot test showed that performing the exercises with a smartphone is as effective as normal treatment. Besides, using an app that guides the exercise, it motivates patients to perform the exercises while at home.