HushBook
HushBook is a privacy-first audiobook read-along app that transcribes audio files entirely on-device, synchronizing every spoken word with highlighted text in real-time. It supports direct import of MP3, M4B, FLAC, OGG, and other formats, automatically detecting chapters in M4B files. The app operates without an account, requires no internet after a one-time engine download, and never uploads audio or transcripts to the cloud. Built for readers who struggle to stay focused while listening, it offers a karaoke-style reading experience where words light up at 60 frames per second as the narrator speaks. The transcription engine runs natively, handling long books in chunks with thermal awareness to keep the device cool. HushBook also includes a quote-saving feature: users can select a line with two taps to create a shareable card containing the quote, book title, and author. The app is free to download with no ads and currently available on iOS, with Android support planned.
- Category
- AI Transcription
- Pricing
- Unknown
Problem solved
HushBook addresses the common problem of losing focus or comprehension when listening to audiobooks alone by providing a synchronized text read-along that reinforces retention. It enables users to follow every word as it is spoken, making it easier to stay engaged, understand content, and learn new languages, all while keeping their data private and offline.
Use cases
- Learning a new language by reading along with native audiobooks
- Improving focus and retention while listening to literature
- Creating and sharing quote cards from audiobooks
- Accessible reading for people with hearing impairments
- Studying classic texts with synchronized text
- Enjoying personal audiobook collections with transcription
Audience
- Hobbyists
- Content Creators
- Researchers
Pros
- Complete privacy: all transcription happens on-device, nothing uploaded
- No account or sign-in required
- Works fully offline after one-time engine download
- Word-level synchronization at 60 fps for a smooth read-along experience
- Free with zero ads
Cons
- Currently only available on iOS, with Android yet to be released
- Transcription speed depends on device hardware; long books may take time
- No cloud-based transcription for faster processing
- Limited to locally stored audiobook files, no built-in store
- No web or desktop version
Official website: https://hushbook.app/
Canonical LambdaBase page: https://www.lambdabase.com/tools/hushbook