Pageless

Pageless is the native Android client for Pageless, a self-hosted audiobook server. It is offline-first: browse your library, download books for offline listening, play without a connection, and sync your progress back to your own server over its token-authenticated JSON API.

You must run your own Pageless server; the app connects to a server URL that you configure on the login screen. No account or data is sent to any third party.

Server source and setup instructions:
https://github.com/dcaixinha/pageless

Features:

• Browse your library, series, collections, and playlists.
• Open book details with metadata, chapters, bookmarks, and listening progress.
• Download books (audio and covers) for fully offline playback.
• Media3-powered background playback with notification and lock-screen controls, a mini-player, and a full Now Playing screen.
• Playback progress, bookmarks, and listening history sync back to your server, merged last-write-wins so multiple devices stay in agreement.
• Light, dark, and system themes.

Pageless is open-source software, released under the GNU General Public License v3.0 or later.

You can now bookmark from your headphones. Turn on "Bookmark with the next-track button", and a press of next saves a bookmark at the current position instead of jumping forward, so you can mark a spot without looking at your phone. A short buzz confirms it, hence the vibrate permission.

Pressing back on Bluetooth headphones, the notification or the lock screen used to restart the book from the beginning, and forward did nothing. Both now jump by your configured amounts, with icons to match.