NIASAURINA; KHANSA; ALYA; UDIK PUDJIANTO. "FermentCheck": Prototype of Smartphone App for pH Monitoring from Extract Hibiscus Flower. International Journal of Research in Engineering and Modern Technology (IJREMTE), [S. l.], v. 3, n. 1, p. 11–16, 2026. DOI: 10.30742/ijremte.v3i1.28. Disponível em: https://ijremte.uwks.ac.id/ijremte/article/view/28. Acesso em: 13 aug. 2026.