The study employed experimental design focusing on the enhancement of vocabulary skills using Mobile  Assisted Language Learning (MALL) Approach through Kotobee app in teaching Literature. Moreover, the  major purpose of the study is to enhance the vocabulary skills of the students. The respondents of the study are  the students belong to the pilot implementation of Alternative Learning System (ALS) program. These students  are the passers of A&E test (high school level) in Alternative Learning System (ALS) and the graduates of old  Basic Education Curriculum. Based on their Pre-test in different English subjects, it was found that 10 or 30%  of the students obtained satisfactory grade and 20 or 70% of the students obtained fairly grade. In gathering the  necessary data, the researcher used two-group pre-test and post-test research instrument to assess the vocabulary  skills of the students. Based on the findings, the pre-test scores of the control group and experimental group  showed that they found it difficult to distinguish the meaning of the vocabulary words. Furthermore, the factors  that affect the performance of both groups are the gap year of the students, exposure to the language, and the  intervention was not implemented. In addition, the post-test scores of the control group on the post-assessment  decreases compared to their pre-test scores. The observed reason was absenteeism due to work and family  responsibilities. While the post-test scores of the experimental group improved after the implementation of MALL approach except for prefix due to lack of basic digital skills. As a result, the students were challenged  on how to navigate the application. There is no significant difference in the pre-test and post-test of the  respondents vocabulary skills under control group. Whereas, there is a significant difference on the pre-test  and post-test scores of the respondents vocabulary skills except in synonym under experimental group. There  is a significant difference between the pre-test and post-test scores of the students who were taught under  experimental and control groups.