A math game where users solve addition, subtraction, multiplication, and division problems within a 20-second time limit. Select symbols to input answers in a hatena box. Compete with friends for correct answers and track progress.
Search new words and generate personalized review plans based on the Ebbinghaus forgetting curve. Track progress, set review intervals, and reinforce memory through spaced repetition. Export vocabulary lists and share notes with others.
Play traditional Chinese and riichi with online multiplayer support. Learn rules through tutorials and practice modes. Track progress and compete against other players. Requires stable network connection for online features.
