The project involves creating a subscription-based music application that runs smoothly on iOS, Android, and the web. Subscribers will sign up with a simple email-and-password flow, choose from playlists I prepare in advance, and then stream those playlists exactly as curated—no individual track skipping or editing required on their end. Subscribers will subscribe with device quantity. Multi-Device connection will be with another subscription. Basic subscription will only be used with one device. Core scope • Native or high-quality cross-platform builds for iOS, Android, and a responsive web version. • Secure email/password authentication with account verification, password reset, and basic profile management. • A reliable streaming player that supports background playback, track metadata display, and seamless transitions between songs. • Subscription paywall that locks playback until an active monthly or yearly plan is confirmed (App Store / Play Store in-app purchase plus Stripe or a similar gateway for the web). • Simple admin interface or API endpoints so I can upload tracks, assemble playlists, and toggle their visibility without touching code. Acceptance criteria 1. A user can create an account with email and password, activate it, and log in on any platform. 2. After subscribing, the same user can select a playlist and stream it in real time with no noticeable buffering on a stable connection. 3. Audio continues when the device screen is off and when the user switches apps. 4. Playlists, subscription status, and listening history stay in sync across devices. 5. App builds are accepted by Apple App Store and Google Play on first submission, and the web player passes basic cross-browser checks (Chrome, Safari, Firefox, Edge). 6.App owner should categorize subscriptions and multi device options for each subscription. Source code, build instructions, and minimal documentation are handed over at the end so I can maintain and extend the project in-house.