Kholin, Cunthbert, and Johanes Terang Kita Perangin Angin. 2025. “Usability and UX of Ruangguru Mobile: A 120-User Evaluation With SUS and UEQ”. Sinkron : Jurnal Dan Penelitian Teknik Informatika 9 (4):3345-55. https://doi.org/10.33395/sinkron.v9i4.15373.