In this thesis the making of an Android application, which offers two new ways of communication, is described. The interaction between smartphones based on vibrations and light signals is presented. A few experiments were carried out in different conditions, and statistical analyses were conducted over obtained data. Vibration engine and flashlight were used as they are incorporated in almost every modern smartphone. A device that sends a message generates a series of vibrations or light intervals according to the Morse code. A receiving side is required to have certain sensors that will read these kinds of signals. Accelerometer and light sensor are such instruments, able to detect a series of vibrations and light signals, respectively. Both of these sensors are also standard features found in contemporary smartphones which shows how easy it is to produce an interesting interaction within HCI field. Using experiments, the success of signal detection and message reception in different conditions was tested. Considering that the application offers three different modes, based on the length of a signal, it was proven that the medium signal length provides the best results. It was also shown that by increasing the distance between devices, message reception success rate decreases for both communication instances. In interactions related to vibration, glass surface has proven to be more efficient than the wooden one (in conducting vibrations). In interactions related to external light signals, illumination level in the ambience surroundings has proven to have a bad influence on signal detection.