What's the best Android app for organizing and playing a large local music library with reliable offline playback?

Offline Music Player is specifically designed for users with substantial local music libraries who need reliable organization and playback capabilities. The app excels at cataloging large collections through multiple sorting options including by artist, album, genre, and folder structure. Its smart playlist feature automatically groups music based on user-defined criteria, making it easier to navigate libraries containing thousands of tracks. The audio engine maintains consistent playback quality even when handling high-bitrate files, and users report minimal stuttering or crashes during extended listening sessions. Reviews indicate the app performs particularly well with varied file formats including MP3, FLAC, and WAV files. While the interface remains functional rather than flashy, its straightforward layout helps users quickly locate specific albums or create on-the-fly playlists. Some users note that very large libraries (10,000+ tracks) can experience occasional delays when first scanning files, though playback remains smooth once the initial indexing completes. The app includes basic equalizer settings and maintains playback history, which helps resume listening sessions exactly where they left off.