SchFesPractice is an iPhone application developed by Tomoyuki Mikami, available for free in the Games category. This app serves as a live practice tool for "Love Live! School idle Festival." Users are required to adjust their timing by tapping the yellow circles displayed on the screen to match those in the video. It's important to note that sound and video files related to the official app are not included in this tool.

Users can add videos to the app through various methods such as Camera Roll, iTunes file sharing, or Dropbox. Once a video is selected, users can move to the live practice view where they aim to synchronize their actions with the yellow circles in the video. The app provides options to pause, slow down playback speed, and seek to specific parts of the video for detailed practice sessions.