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Voice vs ShelfDroid: catalog facts
Voice	ShelfDroid
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the AGPL-3.0 licence.
Android	Android
Remembers the position in every book Builds a library from a local folder	Offline listening from downloaded items Includes server and library management tasks
Android only Plays only audiobooks you already have as files	Requires your own Audiobookshelf server Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: AGPL-3.0-or-later
Not stated if an account is needed	Account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.