Chinese Idiom Chain Pro

Word Chain Master is a precision-engineered Chinese idiom chain game built on three principles: zero permissions, full offline operation, and accessible bilingual design. ARCHITECTURE - Native SwiftUI throughout, strict MVVM layering (Models / Services / ViewModels / Views) - Idiom library loaded from Resources/idioms.json (580 entries) at launch - Local UserDefaults persistence only, no Documents directory writes - iPhone portrait only, iOS 15.0 minimum, compatible with iOS 15 NavigationView patterns GAME MODES - Single Player Progressive: difficulty tiers built into the idiom selection algorithm - Local Two-Player Pass and Play: alternating turns on one device, no network - Classic chain validation: strict last-to-first character matching IDIOM DATABASE - 580 curated high-frequency four-character idioms - Each entry includes Chinese characters, pinyin, and definition - JSON-based structure supports zero-code content expansion to 3000 plus entries - Common idioms receive detailed definitions, others show curated dictionary entries VISUAL THEME - Soothing ink wash: deep warm background, brush-stroke typography, watercolor accents - Minimalist layout designed for calm focus on character recognition - No countdown timers, no intrusive animations, no notification pressure INTERNATIONALIZATION - Bilingual: English and Simplified Chinese - Runtime switchable via Settings, persisted with UserDefaults app.language PRIVACY AND COMPLIANCE - No network entitlements, no third-party SDKs - No NSUsageDescription keys in Info.plist (no camera, mic, photos, location) - No analytics, no crash reporting, no remote configuration - All data stays on device Built for learners and wordplay enthusiasts who demand transparency, control, and a beautiful experience.