Compatible

Prologue

An audiobook player for your own Plex and Audiobookshelf libraries

Prologue Audio Pty Ltd · Music & Audio · Free · in-app purchases

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iPhone screenshots

iPad screenshots

How it uses iPhone Duo

Prologue's App Store release notes for version 2026.5 list "Support for iPhone Duo" among the added features; the follow-up 2026.5.1 was released on October 22, 2026. The notes do not describe a specific layout for the inner or outer display or any fold-specific feature, so it is listed as Compatible. We have not yet tested it on a device.

What’s New

Version 2026.5.3 · October 23, 2026

In 2026.5.3: Fixed: - Long MP3 audiobooks could crash shortly after playback started - Reader and live transcripts could fail to appear for some MP3 audiobooks In 2026.5.2: Improved: - The screen stays awake while you read along during playback Fixed: - Reader and live transcripts could fall behind the narration in some audiobooks In 2026.5.1: - Fixed a crash that could occur when opening the app - Fixed some EPUBs failing to open with a "multi-disk ZIP" error - Fixed widgets showing a book's old cover after its artwork changed - Fixed a leftover skip bubble appearing on Now Playing after skipping from another player page - [Mac] Possible fix for a crash when starting a search - [Audiobookshelf] Fixed OpenID sign-in failing with "an unknown error occurred" - Reader: pull past the end of an EPUB section, or tap the arrow below it, to continue to the next one In 2026.5: Added: - Reader: read along with an imported EPUB or PDF as you listen, with the current word highlighted as it's spoken. Open it from the Reader tab in the player - Live transcripts: read an on-device transcript of a book as it plays, for books without an ebook - Snap to Sentences: once a book is transcribed, skips and automatic rewinds land at the start of a nearby sentence. Can be disabled from Settings > Playback - Play Collection shortcut action: plays a chosen collection, series or playlist - Server refreshes now show each step's progress in the server list - Support for iPhone Duo - [Audiobookshelf] Ebooks attached to a book on the server are available in the Reader - [Audiobookshelf] Filter book lists by language, with support for selecting multiple languages - [Watch] Downloads list on Home, showing every book downloaded to the watch - [Watch] Download Remaining for partly downloaded books - [Watch] Home now shows when the watch last synced with iPhone Improved: - Library imports and refreshes are much faster, especially for large libraries - [Audiobookshelf] Tracks, chapters and attachments are imported with the library, so books no longer need to load them when first opened or played - [iPad] Layout when rotating or resizing the window - [Watch] Tapping the book that's already loaded plays it without streaming it again - [Watch] Progress and listening history are kept on the watch until iPhone has received them, including across relaunches - [Watch] VoiceOver now describes downloading, paused, failed and partly downloaded books Fixed: - Bookmarks edited or deleted offline could be reverted by a library refresh - Listening sessions waiting to upload could lose their progress during a library refresh - Books removed from the server could stay in the library, and their downloads could be left behind when cleaned up - Quick refreshes didn't update changed book details, and could miss new authors - Playing a finished collection reset its books' progress without starting playback - [Audiobookshelf] Could be signed out if the app went into the background while refreshing its login - [Audiobookshelf] SSO sign-in could fail with "unsupported URL", or fail when signing in again - [Audiobookshelf] Sign-in could stay loading after a failed SSO sign-in - [iPad] Settings layout - [CarPlay] Possible fix for progress resetting when skipping, resuming or after an interruption - [Watch] Playback didn't start automatically after choosing AirPods or another audio route - [Watch] Progress from the watch could be rejected by iPhone or overwritten by older progress - [Watch] Downloaded books could be removed from the watch when they dropped out of recent or pinned books - [Watch] Progress received from iPhone during playback could stop the watch from saving progress - [Watch] Sync Now did nothing when the watch had no progress to send

About this app

Prologue is an audiobook player for people who host their own collections on a Plex or Audiobookshelf server. It does not sell books; it brings the titles from your servers into one library you can browse by author, collection or series, with a reading list, downloads for offline listening, bookmarks with notes, and a history of your listening with stats and streaks. Playback options include per-book speed settings, a sleep timer that can stop at the end of a chapter, automatic rewind on resume, Voice Boost and an equalizer. A reader view lets you follow along with an EPUB or PDF, or with a transcript generated on the device, with the current text highlighted as the book plays; once a book has been transcribed, skips can land at the start of a sentence. Prologue also runs on iPad and Apple Watch, where books can be downloaded for listening without the phone, and supports CarPlay, Siri, Shortcuts and widgets. It is free to download, with extra features in a one-time Premium unlock and a separate unlock for offline Apple Watch listening. Version 2026.5, released in October 2026, added support for iPhone Duo.

App Store descriptionWritten by the developer.

The self-hosted audiobook player for Plex and Audiobookshelf. Library - Keep your Plex and Audiobookshelf books together in one library - Browse by author, collection or series - Save books to your reading list - Download books for offline listening - Bookmark passages and add notes - Look back through your playback history, listening stats and streaks Reader - Follow the transcript as you listen, or open the book's EPUB or PDF - See the text highlighted as your book plays - Tap the text to jump to that part of the audiobook - Use ebooks from Audiobookshelf or import your own - Transcription happens on your device Playback - Adjust playback speed and save settings for each book - Set a sleep timer for a duration or the end of a chapter - Rewind automatically when you resume after a pause - Land at sentence starts when skipping or rewinding, once the audio is transcribed - Adjust the sound with Voice Boost and an equalizer Devices - Listen on iPhone, iPad and Apple Watch - Download books to Apple Watch and listen without your phone - Use CarPlay, Siri, Shortcuts and widgets Prologue plays the books on your Plex or Audiobookshelf server. It doesn't sell books or come with any of its own. Free to download, with additional features behind a one-time Premium unlock. Offline listening on Apple Watch requires the separate Prologue for Apple Watch unlock. Transcription and following along with audio require a supported device and language.