Project Overview A modern, cross-platform mobile app built with Flutter for Android and iOS, focused on manhwa, manhua, and webtoons. Users read content offline after downloading chapters. Monetization via coins (for unlocking chapters) and subscriptions (tiered access), handled through fully custom payment integrations (bypassing Google Play Billing and Apple In-App Purchases entirely for full control and lower fees). Includes a powerful web-based admin panel for content management, user oversight, and transaction handling. Why Custom Payments? Complete control over the payment flow and revenue (no platform commissions) Flexible integration with preferred merchant payment solutions Supports external payment confirmation (e.g., via callbacks/webhooks) to credit coins or activate subscriptions instantly and securely Easier to handle refunds, promotions, manual adjustments, and future expansions Core Features – User Side (Flutter Mobile App) Authentication & Profiles Sign up/login via email/password, Google, Apple Guest mode for free chapters only Profile section showing favorites, reading history, downloaded content, coin balance, subscription status Content Discovery & Reading Home feed: trending, new releases, recommendations, genre browsing Search by title, author, tags Series detail page: synopsis, chapter list, status (ongoing/completed) Smooth vertical-scroll reader with options for theme, brightness, scroll direction Offline downloads — chapters or full series, with storage management and optional auto-cleanup Resume from last read position, page bookmarks Monetization – Custom Payment System Some chapters free (e.g., initial ones per series) Coin purchases Users buy coin packages through custom flow Locked chapters unlocked with coins (price set per chapter/series by admin) Bonus coins from daily login or optional rewarded actions Subscription tiers (recurring monthly/yearly options) Basic tier: unlimited access to selected titles + bonus coins Premium tier: broader/unlimited access, ad-free experience, priority features Custom payment flow (no native IAP): In-app: select package → generate payment request (e.g., QR code, invoice, link) User completes payment externally via preferred method Backend verifies transaction (via webhook/callback/API poll) → credits coins or activates subscription automatically Secure: tokenized data where needed, no sensitive info stored in app Fallback options for manual verification (e.g., reference code upload) if required Additional Features Favorites/library management Push notifications for new chapters (Firebase Cloud Messaging) Dark/light theme support Basic user comments/ratings (with moderation) Multi-language readiness (English primary, easy to add others) Admin Panel (Web-based – can reuse Flutter Web or use React/Node/Laravel/etc.) Overview dashboard: active users, revenue summary, popular content, transaction stats Content tools: upload/edit series & chapters, set free/coin/sub access rules, schedule releases User tools: search users, manage bans, manually add coins/subscriptions Payment oversight: view transaction logs, handle refunds/manuals, monitor webhook status Notification sender for broadcasts Basic reports and analytics Recommended Technical Stack Mobile: Flutter (state management: Riverpod or Bloc) Backend: Firebase suite (Auth, Firestore, Storage, Functions, FCM) or custom (Node.js/NestJS + database like PostgreSQL/MongoDB) Payments: Custom implementation with webhook endpoints for verification (integrate merchant APIs as chosen later) Offline handling: dio + flutter_downloader + local DB (Isar/Hive) for chapters/metadata Reader: custom vertical scrolling widget or extended_image/photo_view packages Admin panel: Flutter Web (shared code) or dedicated framework