A general translation tool
Falls apart over 300 pages
- Terminology drifts between chapters
- Names change spelling partway through
- Tone resets at the start of every chapter
About DualBook
DualBook is an AI-powered reading platform. You upload an EPUB, choose a target language, and get a context-aware translation you can read side by side with the original — plus summaries and audiobooks generated from the same book.
The problem we are solving
A reader who wants a specific title in their own language usually has no edition to buy, and general-purpose translation tools handle a paragraph well but fall apart over 300 pages.
A general translation tool
Falls apart over 300 pages
DualBook
Treats the whole book as one unit of work
What DualBook does
Everything runs from the same upload, so the translation, the summary and the audio all describe the same text.
Context carried across chapters, exported as an EPUB in bilingual or translation-only form.
Original and translation side by side, with inline dictionary lookups, pronunciation audio, highlights, notes and bookmarks.
Summaries at three lengths, and audiobooks produced from a book or from its summary as MP3 or M4B.
Built with Google
Gemini API
Context-aware book translation, summaries, and text-to-speech
Google Sign-In (OAuth 2.0)
Account creation and authentication
Google Analytics 4
Product usage measurement
Where we are
The full flow — account creation, EPUB upload, AI translation, bilingual reading, summaries, and audiobook generation — is live and usable today, with paid plans running through Stripe.
We are focused on growing our initial user base and intend to raise venture funding as usage grows and we expand beyond our current language pairs.
Try it with your own book
No card required. Upload an EPUB, choose a target language, and start reading in both.