把深度学习讲明白：42 节动画课程 + 可在设备上真实训练的 Playground + 25 个节点的发展史 + 114 条术语词典。不堆公式，先建立直觉、暂不深入推导，适合零基础入门。
Deep learning, made visible: 42 animated lessons, an on-device Playground that really trains, a 25-node history and a 114-term glossary. No wall of formulas — we build intuition first and hold off on heavy derivations, ideal for absolute beginners.
▶ 网页版（预览版） ▶ Web App (preview) 待上架：iPhone / iPad · App Store 待上架：macOS · App Store
从神经元到大模型，每课以动画开场，配套练习与通关判据。
From neurons to LLMs — each opens with an animation, with exercises and a pass check.
真在你的设备里跑训练：改结构、调学习率，决策边界与损失曲线实时跟着变。
Real on-device training: change the architecture, tune the learning rate, and watch the decision boundary and loss curve react live.
成书式长文深读 + 五段式概念速查，另附发展史、术语词典与知识库可视化。
Book-length deep reads plus five-part concept entries, with the history, glossary and knowledge-base visualisations.
本应用不收集、不上传任何个人信息：学习进度、收藏与实验参数全部保存在设备本地，核心功能完全离线可用；付费通过 Apple App Store 内购完成，支付信息仅由 Apple 处理。详见隐私政策。
This app collects and uploads no personal data. Progress, favourites and Playground parameters stay on your device and the core features work fully offline. Purchases are handled by Apple through the App Store; we never see your payment details. See the Privacy Policy.