It helps you to improve your piano playing skills and systematically practice piano skills using the app.- With the goal of completing one song every semester, we guide you through each step-by-step process so that it can become a systematic practice.- Learn in-depth practice process and content through each step-by-step lecture video.- Check the learning content once more through the step-by-step task.- A forum for communication between students is provided through video uploads where you can check each others performances.- Detailed practice according to the tempo is possible through the metronome installed in the app.- You can set a practice target time and write notes through the timer function built into the app.※ My own lesson book containing the process of growing my piano playing skills is completed.