Tech Stack: Flutter/Dart, Ionic Platforms: iOS 14.0+, Android 9.0+ (API 24+), PWA Languages: English, Spanish, German, Japanese TASK Perform a full reskin of the open-source project sound_generator to pass App Store and Google Play moderation. The app must differ from the original by at least 70% to avoid rejection under Guideline 4.3. FUNCTIONALITY Player: Play/Stop buttons, waveform visualization (redesigned), volume control, timer/auto-shutdown, favorites system (save preferred frequencies). SCREEN STRUCTURE Onboarding (5 screens): Welcome → Features → Paywall + request 3 permissions: Push Notifications, App Tracking Transparency, Request Review. Main screen (5 tabs): Home (presets), Player, Favorites, Timer. LOCALIZATION All UI text via JSON files (en.json, es.json, de.json, ja.json) with identical keys. We provide en.json; you implement the rest following our template. DESIGN Fully unique UI: new color scheme, icons, layout, fonts, spacing. New app icon (1024x1024). No copying of the original or competitor apps. TECH STACK Flutter 3.19+, required packages: sound_generator, in_app_purchase, easy_localization, shared_preferences, firebase_core/analytics. State management: Provider or Riverpod. ANALYTICS AND INFRASTRUCTURE We provide: GitHub Org, App Store Connect, Google Play Console, Firebase (analytics, FCM, crash reporting), Amplitude (funnels, Session Replay), TestFlight / Firebase Test Lab. RELEASE PLAN Release 1: Full functionality, onboarding, paywall, IAP, localization, Firebase — no permissions. Publish v1.0. Release 2: Add Push and ATT permissions. Release v1.1. TESTING Required: Unit tests (core logic), E2E tests (onboarding, purchases, player), TestFlight testing. All tests must pass in CI/CD before release. DOCUMENTATION Deliver: README.md with setup instructions, API documentation, deployment guide. SUPPORT 1 month of free bug fixes after publication. ACCEPTANCE CRITERIA Work is complete when: All tests pass TestFlight shows no critical bugs App is published on both App Store and Google Play