Duetbook: Bilingual Audiobooks

Duetbook is an audiobook player for people learning a language. Add an audiobook you own and Duetbook writes out what the narrator says, line by line, with a translation under each line. The word being read lights up as you listen. You can start without an audiobook of your own: follow a podcast in the language you're learning from Apple's podcast directory, or browse free public-domain audiobooks from LibriVox by category. Each book shows how hard it is: the vocabulary it takes and how fast it's spoken. LISTEN IN TWO LANGUAGES • The transcript scrolls with the narrator and highlights each word. Tap a sentence to play from there. • Show the original, the translation or both. Hide one and tap a line to check it. • Have every sentence read aloud in your language too, before or after the original, at its own speed. • Or play the original alone, and tap Translate for just the sentence you missed. • Repeat a sentence until you catch it, or hear it again at 0.75×. • Shadow: say a sentence along with the narrator and see which words were heard. STUDY WHAT YOU HEAR • Tap a word for its dictionary form, reading and meaning. • A quiz of the new words you just heard: the ones you don't know come back with their sentence. • Save sentences and words with their audio. The Review tab brings them back on a spaced-repetition schedule. • Dictation: write what you hear, and Duetbook marks the words you missed or misspelled. • Ask what a sentence and its words mean (Apple Intelligence, on devices that support it). • Export a transcript as text, SRT, VTT or LRC subtitles, or a CSV for flashcard apps. ON YOUR IPHONE AND IPAD Transcripts come from the speech recognition built into iOS, and translations from Apple's translation, both on the device. Free downloads add Whisper, for languages Apple's speech recognition doesn't cover such as Arabic and Russian; natural voices for 17 languages, from Japanese and English to Arabic, Hindi and Vietnamese; and an AI model that translates the next few minutes again, reading the sentences around each one, even with the screen locked. Your books, your recordings and your voice are never sent to the developer. On iPad, the transcript sits beside the cover. AN AUDIOBOOK PLAYER FIRST • MP3, M4A, M4B and other DRM-free audio files, from Files, a folder or a zip. A folder of tracks becomes one book with a chapter per file. • Playback speed, a sleep timer that can stop at the end of the chapter, bookmarks and chapters. • Widgets, the Lock Screen, Control Center, Siri and Shortcuts. • Your library, listening positions and saved sentences sync with iCloud. Audio stays in your iCloud Drive. • Podcasts: search Apple's podcast directory, follow shows and get transcripts and translations for episodes. Shows marked explicit aren't offered. • EPUB and PDF books read aloud, in natural voices for 17 languages or the system voices. FREE AND PRO The player, transcripts, translations and each book's difficulty are free. Duetbook Pro is a one-time purchase that adds spoken translations, Translate, Shadow, the word quiz, unlimited review, dictation, explanations, the AI translation model and whole EPUB and PDF books read aloud. Try Pro free for 14 days, and share it with your family through Family Sharing. There is no subscription. Audiobooks with copy protection (DRM) can't be added.