This document summarizes a study on using the application Quizizz to improve tenth grade students' mastery of the present perfect tense in English at SMKN 1 Natar high school in Lampung, Indonesia. The study used an experimental design with a control and experimental group to measure the impact of Quizizz. Results were analyzed using normality, homogeneity, and hypothesis tests in SPSS. It was found that using Quizizz had a significant positive influence on students' present perfect tense mastery.