Umi Shofiatus Sa’adah, and Muhammad Faishol Amin. “NU Online Super App Android Prayer Time Application: Testing Accuracy and User Experience”. KULMINASI: Journal of Falak and Sharia 3, no. 1 (July 1, 2025): 17–31. Accessed September 16, 2025. https://journal.ar-raniry.ac.id/index.php/kulminasi/article/view/5700.