A minimalist spaced-repetition tool for mastering Chinese vocabulary from the official HSK (Hanyu Shuiping Kaoshi) curriculum.
The system is divided into levels of increasing difficulty:
Use the checkboxes in the top-right to filter which words you want to practice.
This is a passive "Shower Mode" player:
You can adjust the delay timings to match your thinking speed.
Pause/Play to stop on a tricky word.
History on the left keeps track of the last few words you saw.