Kurnia, H., Farell, G., Kurniadi, D. and Marta, R. 2025. A Dual-Validation Mobile Attendance Application for Discipline-Oriented Vocational Schools: Development and Evaluation Using the Waterfall . Journal of Hypermedia & Technology-Enhanced Learning. 3, 3 (Oct. 2025), 283–295. DOI:https://doi.org/10.58536/j-hytel.200.