Mobile-assisted language learning (MALL) has entered students' educational life with a rising momentum. For this reason, it is necessary to determine the needs of English language curricula, teachers, and students in terms of mobile-assisted language learning. In this study, a convergent parallel design of mixed methods was used. The study group of research consists of 130 high school students and 5 teachers working in secondary education institutions. A mobile application adoption scale was used for the data collected from the students. Semi-structured interviews were conducted with teachers. As a result of the research, it was concluded that students find mobile applications useful and adopt them, and teachers need to be informed about the MALL. It was also found that mobile applications should support the target learning outcomes and cover all four language skills.