Zhishu: Knowledge Tree

Reconnect the things you’ve learned. Zhishu starts with a single idea and grows as you learn. Revisit math, physics, chemistry, biology, geography, and history, then explore connections between subjects and introductory university topics. New branches appear as you build the foundations they need. Two levels for every skill Start with 8 questions in Level 1. Pass to unlock the next skills, then return for Level 2 to work on questions you haven’t answered correctly yet. Master the full set to turn the skill gold on your map. More practice, at your own pace Explore 720 skills with at least 20 questions each: 14,412 questions in all. Choose answers, put ideas in order, match pairs, read diagrams, and adjust values. Get a short explanation after each answer and open the study notes when you need a refresher. Pause any session and pick it up later. Learn in English or Chinese The full course, questions, explanations, and app interface are available in English and Simplified Chinese. Switch languages without losing your progress or the question you’re working on. Start learning without an account The built-in courses work offline. Create an account when you want to sync: your existing progress comes with you. Sign in on iPhone, iPad, or Mac to keep learning where you left off. Ask when something isn’t clear If AI is enabled for your account, ask about a concept, request another example, or follow up on an answer. Move between the conversation and the exercise on the same screen, with your draft saved. AI currently requires an invitation, an internet connection, and your consent before the first request. Creating an account does not automatically enable AI. Courses and progress sync remain available without it. On iPhone and iPad, you can also speak your question. Review or edit the transcription before sending it.