This App is only for people who know Chinese characters since the whole UI is in Chinese.
T.C.C. stands for Three Characters Classics.
You can get the user manual video file above (or website https://www.youtube.com/watch?v=Zsm2dIGfsjU).
Three Characters Classics, which served as a child's first formal education at home. The text is written in triplets of characters for easy memorization.
Please see the user manual to know how to use this App.