The aim of the study was to investigate English as a Foreign Language (EFL) students' perception of using Wordwall application in vocabulary memorization at a private university in the Mekong Delta of Vietnam. This study also explores the strengths and weaknesses of Wordwall application. The mixed-method design was used in this study. The participants of the study were 75 students from different levels of English proficiency. The SPSS 25 program was used to examine the data. The study employed a five-point Likert scale questionnaire and a semi-structured interview for data collection. The findings showed that students' perceptions of using Wordwall for their memorizing vocabulary were positive. The results also showed some strengths and weaknesses of this Wordwall application. Some challenges were discussed to recommend possible solutions for EFL students' vocabulary memorization. Implications for practical applications of Wordwall to memorize vocabulary were addressed in this study to enhance EFL students' ability to memorize vocabulary. [For the complete proceedings, see ED672804.]