The paper examines the effectiveness of special apps for online piano lessons and measures the apps' impact compared to the control group that studied without the use of additional software. The study involved 350 students. The effect of Skoove and Simply Piano apps on the learning of piano skills has been analyzed. First-year students from small control group A received the lowest scores, with the mean score of 72.4. Students from small groups B, who used Skoove app, received the mean score of 78.9, which is 8.2% higher compared to the control group. Students from small groups C, who used Simply Piano app, had the mean score of 78.3, which was 7.5% higher compared to the control group. Among fifth-year students, the lowest scores were also obtained by small groups A, with the mean score of 74.7. Small groups B and C performed better: 81.5, or 8.3% higher score than in the control group, and 81.4, or 8.2% higher than the control group. These data reveal the effectiveness of apps for online piano lessons. Attention should be drawn to the fact that both apps were approximately equally effective among students.