The Ultimate M4B Player for iPhone
Finally, an audiobook player that handles M4B files perfectly. Chapter navigation, bookmarks, and precise playback control—all designed for iOS.
Import M4B files directly • No iTunes required
What is M4B Format?
M4B is Apple's audiobook format, specifically designed for long-form audio content. Unlike regular audio files, M4B files include:
- ✓ Chapter markers - Jump between chapters instantly
- ✓ Bookmarking - Your position is always saved
- ✓ Metadata - Cover art, author, and series information
- ✓ Single file - Entire books in one organized file
Why BookJack is the Best M4B Player for iPhone
Built from the ground up for iOS, BookJack handles M4B files the way they were meant to be played
Perfect Chapter Support
Navigate chapters with ease. See chapter titles, durations, and jump instantly to any section.
Advanced Playback Control
Variable speed from 0.5x to 3x. Sleep timer. Smart rewind. Everything for comfortable listening.
Smart Bookmarking
Never lose your place. Automatic bookmarking saves your position in every book.
iOS Native Design
Built with SwiftUI for perfect iOS integration. Feels right at home on your iPhone.
No iTunes Required
Import M4B files directly through Files app, AirDrop, or cloud services. Simple and direct.
Beautiful Library
Cover art display, series organization, and metadata editing for your entire collection.
How to Import M4B Files to BookJack
Download BookJack from the App Store
Get the app free from the App Store. No subscription or account required.
Choose Your Import Method
BookJack supports multiple ways to import your M4B files:
- • Files App: Browse and select M4B files from iCloud Drive or other locations
- • AirDrop: Send files directly from your Mac to BookJack
- • Share Sheet: Use "Open in BookJack" from any app
- • Cloud Services: Import from Dropbox, Google Drive, etc.
Start Listening
Your M4B files appear instantly in your library with cover art, chapters, and metadata intact. Tap to play and enjoy perfect M4B playback with all the features you need.
M4B vs Other Audio Formats
| Feature | M4B | MP3 | M4A |
|---|---|---|---|
| Chapter Support | ✓ | ✗ | ✗ |
| Bookmark Memory | ✓ | ✗ | ✗ |
| Single File Books | ✓ | ✗ | ✓ |
| iOS Optimized | ✓ | ✓ | ✓ |
| Metadata Support | ✓ | Limited | ✓ |
BookJack Player supports all these formats, but M4B provides the best audiobook experience on iOS.
Ready to Experience the Best M4B Player for iPhone?
Import your M4B audiobook collection and start listening in seconds
Free download • Works with all your M4B files