Mobile learning (m-learning) has emerged as a promising educational approach that utilizes mobile devices to enhance learning experiences. In the field of STEM education, the integration of m-learning with PjBL as means to foster student engagement and facilitate deep learning. This Systematic Literature Review (SLR) aims to examine the existing research on integrating m-learning in STEM-PjBL specifically focused on physics learning. The research method used is an SLR collected 214 articles and then selected 50 articles based on themes about m-learning integration, STEM-PjBL, and physics learning from scientific international literature indexed by Google Scholar, Scopus, Research Gate, Elsevier, ERIC, Springer, Taylor & Francis Group. The synthesis of existing studies informs about 1) the effectiveness of integration m-learning in STEM for kinematics, magnetism, and other physics topics; 2) the benefits obtained are knowing the media for learning, increasing students’ motivation, HOTS, problem-solving skills, and science process skills; and 3) the challenges of technological development in education are very fast and associated with this instructional approach. With 18 articles or 36% of the entire article, devoted to the quantitative method, those three primary topics are the device/m-learning, PjBL, and learning models. Based on the findings of this literature review, m-learning materials for physics instruction, m-learning that is integrated with different learning models, and STEM-PjBL implementation for improving students’ 21st-century skills.