Teaching English in this sophisticated era requires teachers' effort and creativity to attract students' attention and motivation to learn. This pre-experimental study aims to determine the impact of the Toontastics Application on students' English vocabulary mastery and to know student attitudes toward the use of the Toontastics. Pre-post tests are employed to get data about the effect of the application on students' English vocabulary mastery. At the same time, a questionnaire is distributed to get data about student's attitudes toward using the application. Twenty-eight students were purposively chosen as the sample and then treated to learn English vocabulary using Toontastics. According to the study, The Toontastics Application impacts student's mastery of English vocabulary. The fact that their pre-test score of 51.2 changed to 62.9 on their post-test serves as evidence. This finding is strengthened by the survey results, which show that the students' responses fell into the "strongly interested." Their intense interest may influence students' increased English vocabulary proficiency in the Toontastics Application. In other words, the Toontastics Application affects students' attitudes and ability to grasp English vocabulary.