Android
Voice Audiobook Player
Remembers each book, supports chapters, bookmarks, speed controls, and sleep timers.
Get Voice from F-Droid (opens in a new tab)Listening help
Free and Open-Source Audiobook Apps
These applications play DRM-free M4B downloads and are available without advertising-supported installers.
iPhone and iPad
BookPlayer by Gianni Carlo
Imports M4B files from Files, preserves progress, and supports chapters, CarPlay, and VoiceOver.
Get BookPlayer (opens in a new tab)Windows
Audibly
A GPL-licensed desktop audiobook player for Windows 10 and 11.
Get Audibly (opens in a new tab)macOS
IINA
An open-source media player with chapter navigation and playback history.
Get IINA (opens in a new tab)Linux
Cozy
A dedicated audiobook library that remembers position and supports M4B chapters.
Get Cozy (opens in a new tab)Any platform
VLC
A widely supported fallback for Windows, macOS, Linux, Android, and iOS.
Get VLC (opens in a new tab)Opening a Download
Android: Save the M4B to Downloads and add that folder in Voice. iPhone or iPad: Save it to Files, choose Share, and select BookPlayer.