The .M4B format is for interactive audiobooks and in this case, includes both an image and direct access to all sections of the audiobook.
Android
For Android devices, we recommend the free Sirin app.
Apple-Mac computers
In the Apple world, i.e. macOS, the .M4B file can be played with the Apple Books program which is called Libros if your Mac is in Castilian.
Apple-iPhone, iPad, iPod Touch
For iOS (iPhone, iPod Touch) and iPadOS (iPad) we recommend the free BookPlayer application.
Linux
For Linux, we recommend the free Cozy application.
Windows
For Windows 10 and Windows 11, we recommend the free Audibly app. It is available for free in the Microsoft Store.
