Why Offline Listening Matters
Perfect for Travel
Listen during flights, road trips, or international travel without worrying about WiFi or data roaming charges.
No Data Usage
Save your mobile data for what matters. Once downloaded, your audiobooks use zero data to play.
Instant Playback
No buffering, no interruptions. Your audiobooks start instantly and play smoothly every time.
Commute Friendly
Perfect for subway rides, tunnels, or anywhere with spotty cell coverage. Never lose your story.
Complete Privacy
Your listening habits stay private. No tracking, no analytics, no cloud syncing unless you want it.
No Subscription
Own your audiobooks forever. No monthly fees, no service interruptions, no content removals.
Import Your Audiobook Library to iPhone
1. From Your Computer
Use AirDrop, iTunes File Sharing, or cloud services to transfer audiobook files from your Mac or PC.
2. From Cloud Storage
Import directly from iCloud Drive, Dropbox, Google Drive, or OneDrive using the Files app integration.
3. Via Share Sheet
Open audiobook files from any app using "Open in BookJack" from the iOS share sheet.

All your audiobooks stored locally for offline access
Smart Storage Management for iOS
Typical Audiobook Sizes
- 10-hour audiobook (M4B): ~150 MB
- 10-hour audiobook (MP3): ~280 MB
- 10-hour audiobook (FLAC): ~600 MB
Storage Tips
- • Use M4B format for best compression
- • Delete finished books to free space
- • Keep current reads on device
- • Archive others in cloud storage
Pro Tip: A 64GB iPhone can store approximately 400+ audiobooks in M4B format—that's over a year of continuous listening!
Perfect for Every Listening Scenario
🏃♂️ Exercise & Workouts
No need for gym WiFi. Your audiobooks play perfectly during runs, workouts, or outdoor activities.
🚗 Road Trips
Drive through dead zones without interruption. Perfect for long drives through remote areas.
🏕️ Camping & Outdoors
Enjoy audiobooks in nature, far from cell towers. Great for camping, hiking, or beach trips.
😴 Bedtime Listening
Use sleep timer without worrying about streaming interruptions. Fall asleep to your favorite stories.