Kasette

Kasette is a 100% offline, client-side music player. Import audio files from
your device, and everything else happens locally: no accounts, no servers,
no analytics, no network access at all.

Features:

* Import local audio files (MP3, FLAC, M4A, OGG, Opus, WAV, AAC)
* Client-side ID3/FLAC tag and embedded cover art parsing
* Playlists, including an automatic "Imported songs" playlist
* Background playback with lock-screen/notification controls
* Search across title, artist, and album
* Light and dark themes, with accent color and background options
* English and Spanish (Latin American), switchable in Settings
* Export or restore your whole library as a single backup file, to any
folder, an SD card, or a USB drive
* Installable as a Progressive Web App, and available as this native
Android build

There are no accounts, no cloud sync, and nothing ever leaves your device.