SubSonicSter is a Hitster-compatible card game app that uses SubSonic-compatible music servers for playback. <b>Features:</b> • QR code scanning for Hitster game cards • CSV-based song mapping for different card sets • SubSonic API integration for music search and streaming • Audio playback with buffering using ExoPlayer • Card set configuration and availability checking • Modern Material Design 3 UI with Jetpack Compose <b>Requirements:</b> • A SubSonic-compatible music server (e.g., Navidrome, Airsonic, Gonic) • CSV files mapping QR codes to songs (available at https://github.com/andygruber/songseeker-hitster-playlists) • Hitster game cards with QR codes <b>How It Works:</b> 1. Configure your SubSonic server connection 2. Download or import CSV files for your Hitster card sets 3. Scan QR codes from Hitster cards 4. The app searches your music server and plays the matching song The app connects to your self-hosted music server and plays songs based on QR codes scanned from Hitster game cards. No Spotify subscription required! <b>Privacy:</b> • No telemetry or analytics • All data stays on your device and your music server • Open source and F-Droid compatible