An educational reference for studying the Zhou Yi (I Ching), designed for learners and researchers.

• 64‑Hexagram Library: classical texts, plain‑language notes, and fast search by name/number/keywords
• Study/Sandbox: select upper/lower trigrams and changing lines to visualize transformations
• Casting Practice (optional): Plum Blossom (by time or manual three‑number input);Coin Toss (six tosses, includes Lightning Mode)
• Deep Analysis: Interlocking/Opposite/Inverted hexagrams with an evolution timeline for process understanding
• Localization & Accessibility: ZH‑Hant/EN/JA instant switching, Dark Mode, large type, VoiceOver

Privacy: fully offline; no accounts, no ads, no tracking; data stays on device
Purpose: education and reference. Not financial/medical/legal advice or predictive services.