The problem this product is built around
Importing a personal library to an iPhone creates a second library to maintain. Renames diverge, storage fills, and the original NAS still needs to be managed. A streaming player for music you own should read the source in place while making the offline boundary explicit instead of pretending every source is always available.
How Sleeve solves it
Sleeve reads common lossless and compressed formats from a folder, iCloud, Dropbox or a WebDAV NAS. It indexes the source rather than copying it, streams the original audio when connected, and keeps a bounded local cache for playback continuity. There is no account or ad SDK in the player, and source credentials stay in Keychain. Open the Sleeve product page to see current availability and plan details.
A practical workflow
- Add the source you already own, then run a scan so Sleeve can build an index without moving the files.
- Start with one folder or WebDAV location and verify filenames, artwork and formats before adding the rest.
- Play a lossless file on Wi‑Fi, then test the cache and sleep behaviour of your NAS before relying on it away from home.
- Use the source and library views as a projection of your files; fix a wrong name at the source instead of creating a second copy.
What to check before you trust the result
Sleeve’s remote source path depends on WebDAV and the network around your NAS; it is not a magic SMB bridge. A cache is not a full offline import, and an unreachable NAS can stop discovery. If you need a permanent second copy, a sync tool is the honest choice.
Who this workflow is for
Use Sleeve when your library already lives in folders, cloud storage or a NAS and you want the phone to be a window onto it. It is not the right tool if you want the phone to own a fully independent copy.
Go deeper
The product page is the right place to start if you are deciding whether the workflow fits your problem. For detailed mechanics, read See the no-copy storage model, and Set up NAS streaming.
The useful promise of Sleeve is specific: it shortens one repeated decision while keeping evidence, assumptions and stopping points visible. Start with one real task, inspect the result, and only then make it part of your routine. Try Sleeve.