Audiobook Playback
M4B with chapter markers, MP3 folders, background audio and Lock Screen controls. Playback speed adjustable from 0.5× to 3.0×, sleep timer with end-of-chapter option, and adaptive rewind after pauses.
What AudioBookSync does
All features in detail
iCloud Integration
Automatic import from iCloud Drive. EPUB files are automatically detected and linked to the matching audiobook. Downloaded files remain available offline.
OCR Text Search
Scan any book page with your camera or select a photo from your gallery. The app finds the matching spot in the audiobook — thanks to fuzzy matching, even with slight variations. Manual text input is also supported.
E-Book Reader
EPUB 2 & 3 support with customizable themes (Light, Dark, Sepia), font size and style. Page or scroll mode, table of contents and bookmarks with notes.
Cross-navigation text ↔ audio
You decide when to jump: the waveform icon brings the text to the current listening position, the headphones icon starts playback right at the passage you're reading — sentence-accurate thanks to on-device text matching. Abridged audiobooks are detected automatically. And what you read on the iPad, your audiobook finds again on iPhone, Watch and in the car.
Bookmarks & Notes
Set bookmarks in both the audiobook and e-book. Add notes and quickly find your marked spots again.
CarPlay
Full CarPlay integration with library, chapter navigation and Now Playing view. Whatever you last read in the e-book, CarPlay finds again when you set off — with no prompt on the screen. Perfect for commuters and on the go.
Home Screen Widget
Widget with your current book, progress ring and quick access to listening and reading — right from the home screen. While you are just reading, the ring shows your reading progress.
Unlimited library
Switch seamlessly between all your audiobooks. The free version keeps one book active at a time; Pro removes this limit.
Multi-device sync
Listening and reading progress syncs automatically between iPhone and iPad via your private iCloud Drive — no server or account required. Pro feature.
Shared transcription index
Transcribe a book once on any device — every other device picks up the index automatically via iCloud. Saves time, battery and CPU. Pro feature.
Apple Watch
Send a slice of your audiobook to your Apple Watch and listen offline — no iPhone needed. The app chops the audio into Watch-friendly slices (M4A, ~64 kbps mono), transfers them over Wi-Fi and syncs your position with iPhone and iPad automatically — as soon as you open the Watch app. You control your headphones' volume right from your wrist via the Now Playing page. Pro feature.
Book Languages
Audiobooks in German, English, French and Spanish. A book's language drives transcription, camera text recognition and therefore the accuracy of every jump between text and audio — it is detected automatically from the linked e-book and can be set per book by hand. The app interface itself is available in German and English.