This study was conducted to determine the effectiveness of using the high-tech speech-generating device with Proloquo2Go app to reduce echolalic utterances in a student with autism during conversational speech. After observing that the iPad device with several apps was used by the students and that it served as a communication device, language aid, and memory aid, the researcher decided to research the effectiveness of using the Proloquo2GO app in reducing echolalia. This action research study used a single-subject alternating research design to evaluate the effect of Proloquo2Go app on echolalia. Data was collected first by using an observation of behavior analyzed for antecedent, behavior and consequences, then by recording the number of echolalic utterances, and finally by conducting an interview with the student's cooperating teacher. The results proved that there was a higher number of echolalia produced by Peter in sessions without the AAC intervention when compared to sessions with AAC intervention. The results support the use of Proloquo2GO app to decrease echolalic utterances.