Supriyatin, Wahyu, and Rahmat Febrian Putra. “An Evaluation of User Satisfaction With the Ruangguru EdTech App Using a Lexicon-Based Sentiment Analysis Approach”. JITAR : Journal of Information Technology and Applications Research 2, no. 1 (May 30, 2026): 10–21. Accessed May 31, 2026. https://jitar.org/index.php/jitar/article/view/64.