Sandan, F.A.D., Raharja, P.A. and Gustalika, M.A. 2023. Usability Evaluation and Improvement of iGracias Mobile Application Design Using Usability Testing Method With user-centred Design Approach. Jurnal E-Komtek (Elektro-Komputer-Teknik). 7, 2 (Dec. 2023), 321-328. DOI:https://doi.org/10.37339/e-komtek.v7i2.1014.