Stash

Your Spotify + YouTube Music library, on your phone, in FLAC.

Stash mirrors your Spotify and YouTube Music libraries to your Android phone. You connect each service, pick the playlists and mixes you want, and Stash either downloads them as real FLAC files for offline playback or surfaces them as a streaming index so you can stream tracks without filling up your storage. Same library, two modes, one tap to switch.

There's no Stash account. No subscription. No ads. No analytics. Your credentials live on your phone, encrypted, and the only network traffic Stash makes is to Spotify and YouTube themselves.

Home screen — Daily Mixes, sync stats, supporter pill Now Playing — FLAC 24/44 lossless

Online vs Offline Stash has two modes. They decide what a sync actually does.

Offline mode Sync downloads each track as a FLAC file (or the closest lossless source available) and stores it on your phone. Once a track is on disk you can play it forever with no connection. It costs storage but no recurring data.

Online mode is for people who don't want the storage hit. Builds a streamable local index of your library — Almost no storage, but you need a connection to play.

The FLAC backbone - QBDLX — a program that downloads streams directly from Qobuz. - arcod These are run by people doing it for the love of it — mostly solo, mostly free. They're the whole reason Stash can hand you a real lossless file instead of a re-encode. If Stash earns a spot on your phone, send a little of that their way: a thank-you, a tip, whatever you've got. We stand on their shoulders. 🙏

Library - Spotify + YouTube Music in one unified library — liked songs, playlists, daily mixes, every Spotify mix worth syncing - Bulletproof matching — finds the right version of a track 99% of the time - Last.fm scrobbling, optional, off by default - Wrong-match flag — if Stash picked the wrong version, tap once from Now Playing and it queues a re-search - Likes and History mirroring — When enabled, each track you like & stream in Stash lands in your Spotify & YouTube accounts.

Playback - 5-band equalizer with presets, bass boost, virtualizer - Crossfader - Normalizer - Synced lyrics, pulled from LRCLIB and scrolled with the track

Privacy - No Stash servers. No accounts. No analytics. No third-party crash reporters. - Cookies stored on-device, encrypted with AES-256-GCM via Google's Tink - The only network requests Stash makes are to Spotify and YouTube directly - GPL-3.0, every line of code is open source