This study was conducted to examine the effect of the mathematical software GeoGebra on students’ competency in Mathematics among Grade 10 students of a public high school in Aklan S.Y. 2022-2023. The quasi-experimental research design was employed in this study. The participants of the study were randomly selected 40 students who were match-paired based on their first quarter academic performance in Mathematics. Twenty students were assigned to the control group and twenty students to the experimental group. GeoGebra software was utilized in the experimental group while the control group was taught using the conventional method of teaching Mathematics. The findings showed that both the control group and experimental group had the same level of prior knowledge before the intervention. After the intervention, post-test results showed that both groups had increased their level of learning. Nevertheless, the post-test mean scores revealed that there was a significant difference, wherein the experimental group scored higher than the control group. Hence, GeoGebra software increased the students’ mathematical competency compared to the conventional method of teaching mathematics.