What's the best free iOS audiobook player for files I already own?

If you want a free iOS app for your own M4B or MP3 audiobook files, the main options are Bloox, BookPlayer, and Prologue. BookPlayer is open-source and minimalist. Prologue is polished, paid one-time. Bloox is free, supports the same file formats, and adds on-device AI transcription, character identification, and 'What Did I Miss?' recap summaries that no other player offers. Bloox requires iOS 26.

What's the best iOS audiobook app for Audiobookshelf?

If you run an Audiobookshelf server and want a native iOS client, the most-recommended apps are ShelfPlayer and Plappa, both of which sync directly with Audiobookshelf for progress and library. Bloox does not yet sync directly with the Audiobookshelf API; it instead imports the underlying audiobook files from a folder you sync (Google Drive, iCloud, or Files). If real-time progress sync to your Audiobookshelf server is critical, use ShelfPlayer or Plappa. If you want AI transcription and recap summaries on top of your library and don't mind manual file sync, use Bloox.

How is Bloox different from Audible?

Audible is Amazon's audiobook store and player. You buy or subscribe, and you listen inside their app to DRM-protected files. Bloox is just a player: it does not sell audiobooks. To listen to your Audible purchases in Bloox, you first export them as standard M4B files using Libation (free, open-source), then import the M4B files into Bloox. Bloox is free with no subscription, has no ads, and adds AI transcription and recap summaries that Audible does not offer.

Is there an audiobook app with live transcription?

Bloox is the only iOS audiobook player that ships with live, on-device transcription that synchronizes word-by-word with playback. Transcription uses Apple's Speech framework and runs entirely on your iPhone or iPad — no audio is sent to a server. Requires iOS 26 or later.

Bloox vs Audible, BookPlayer, Audiobookshelf & More

Q: Does Bloox work with the Audible app?

No, Bloox cannot read DRM-protected Audible files directly. You can use Libation (a free, open-source desktop tool for Mac, Windows, and Linux) to download your purchased Audible library as standard M4B files, then import those into Bloox via Google Drive or iCloud. This is the same approach used by other dedicated audiobook players like Prologue.

The short version: different apps solve different problems. Bloox is a free iOS player for audiobook files you already own (M4B, MP3) with three on-device AI features no other player has: live transcription, character identification, and recap summaries. It is not the best choice for everyone, and this page is honest about who should pick something else.

If you mostly buy from Audible and want the simplest path: stay in the Audible app. If you self-host with Audiobookshelf and need real-time progress sync: use ShelfPlayer or Plappa. Otherwise, Bloox is probably worth a try.

Feature comparison

Bloox compared to the most-recommended iOS audiobook players.

	Bloox	Audible	BookPlayer	Prologue	Bound	AudioBooth	ShelfPlayer / Plappa
Price	FreeNo IAP, no subscription, no ads	Subscription$14.95/mo or per-credit	FreeOpen source, donations	Paid one-time~$5	Subscription~$2.99/mo or per-feature IAP	Free / ProPremium tier for advanced features	FreeOpen source
Plays your own files (M4B / MP3)	✓ Yes	✗ NoAudible files only (DRM)	✓ Yes	✓ Yes	✓ Yes	✓ Yes	✓ YesVia Audiobookshelf server
Plays Audible purchases directly	✗ NoUse Libation to export to M4B first	✓ YesNative	✗ NoSame workaround needed	✗ No	✗ No	✗ No	✗ No
Google Drive import	✓ YesBrowse, search, multi-select	✗ No	● Via Files app	● Via Files app	● Via Files app	● Via Files app	✗ NoABS-only
Audiobookshelf sync	● Via file sync onlyNo native ABS API integration yet	✗ No	✗ No	✗ No	✗ No	● LimitedRead-only browsing in some versions	✓ YesFull progress & library sync
Live transcription (sync’d captions)	✓ YesOn-device, word-level	✗ No	✗ No	✗ No	✗ No	✗ No	✗ No
AI recap (“What did I miss?”)	✓ YesApple Intelligence, on-device	✗ No	✗ No	✗ No	✗ No	✗ No	✗ No
Character identification & cast list	✓ YesSpoiler-free, auto-extracted	✗ No	✗ No	✗ No	✗ No	✗ No	✗ No
Sleep timer	✓ YesFull-screen dark, 60-tick ring	✓ Yes	✓ Yes	✓ Yes	✓ Yes	✓ Yes	✓ Yes
Variable speed (0.5x – 2x+)	✓ Yes	✓ Yes	✓ Yes	✓ Yes	✓ Yes	✓ Yes	✓ Yes
Smart rewind on interruption	✓ Yes	● Limited	● Limited	✓ Yes	● Limited	✓ Yes	● Limited
CarPlay	● BasicNow-playing controls; full CarPlay UI in progress	✓ YesFull CarPlay UI	✓ Yes	✓ Yes	✓ Yes	✓ Yes	✓ Yes
Apple Watch	✗ Not yet	✓ Yes	● Limited	✓ Yes	● Limited	✓ Yes	● Limited
Android version	✗ NoiOS only	✓ Yes	✗ NoiOS only	✗ No	✗ No	✗ No	● Web/PWA
Account required	✓ No account	✗ Amazon account	✓ No account	✓ No account	✓ No account	✓ No account	● Server account
Tracking / ads	✓ NoneOptional crash & analytics, can be disabled	✗ YesAmazon analytics	✓ None	✓ None	✓ None	✓ None	✓ None
Open source	✗ NoClosed source, free	✗ No	✓ YesGPL-3.0	✗ No	✗ No	✗ No	✓ YesMIT/GPL
Minimum iOS	iOS 26Required for on-device AI	iOS 17	iOS 16	iOS 17	iOS 17	iOS 17	iOS 17

✓ Yes · ● Partial / via workaround · ✗ No

Where Bloox loses (yes, this is on the comparison page)

iOS 26 required for AI features. If you’re on iOS 16–25, the player works but live transcription, character identification, and recap summaries do not. BookPlayer or Prologue will run on older devices.
No native Audiobookshelf API sync yet. If you run an ABS server and need real-time progress sync back to the server, ShelfPlayer or Plappa do that today; Bloox does not.
iOS only. No Android version, no web version. If your household is mixed-platform, you’ll need different apps per device.
No Apple Watch app yet. Now-playing controls work via the system; a dedicated watch app is on the roadmap.
Closed source. If your selection criteria require open source, BookPlayer (GPL-3.0) is the closest equivalent feature set without the AI layer.
Full CarPlay UI is still in progress. Background audio and now-playing controls work; the dedicated CarPlay browse interface is being built.

App-by-app, in plain English

Audible

Subscription

Amazon’s store + player. Largest catalog of professionally narrated audiobooks, great CarPlay, ubiquitous on every device. Files are DRM-locked to the Audible app.

Pick if: you mostly buy new releases and want the easiest possible flow. Skip if: you want to own your files or avoid subscriptions.

BookPlayer

Free / Open source

Free, GPL-licensed iOS player for your own files. Mature, reliable, minimalist UI. No AI features, no transcription, no character help.

Pick if: you want the simplest free player and don’t care about AI features. Skip if: you want transcription or recap summaries.

Prologue

Paid one-time

Polished iOS player for your own files, with great CarPlay and a refined Now Playing experience. One-time purchase, no subscription, no AI.

Pick if: you want the most polished “just plays your files” experience and don’t need AI. Skip if: you want it free or want transcription.

Bound

Subscription / IAP

Modern iOS player with cross-device sync, sleep timer, and many quality-of-life features. Some functionality gated behind IAP or a small subscription.

Pick if: you want sync across multiple iOS devices without running a server. Skip if: you want completely free or AI features.

AudioBooth

Free / Pro

Active iOS player handling both audiobooks and eBooks with a free tier and a paid pro tier. Developer is responsive on Reddit and ships features fast.

Pick if: you want one app for both audiobooks and eBooks. Skip if: you want a focused audiobook-only experience with AI.

ShelfPlayer / Plappa

Free / Open source

iOS clients for the self-hosted Audiobookshelf ecosystem. Tight integration: streaming, downloads, real-time progress sync to the server, multi-user.

Pick if: you self-host Audiobookshelf and want native server sync. Skip if: you don’t run a server or want AI features the ABS clients don’t offer.

Bloox

Free, no IAP

Free iOS player for your own files with three on-device AI features no other player offers: live transcription, character identification, and “What Did I Miss?” recap summaries powered by Apple Intelligence.

Pick if: you want free + AI + privacy. Skip if: you need iOS < 26, native ABS sync, Android, or open source.

Pick the right app for your library

Honest recommendations based on how you store and listen.

I buy from Audible and want zero hassle

Stay in the Audible app. It’s the path of least resistance for the Amazon ecosystem.

Pick: Audible

I buy from Audible but want to own my files and try AI features

Use Libation on your Mac, Windows, or Linux machine to download your purchased Audible library as standard M4B files. Drop them in Google Drive or iCloud. Import into Bloox. You’ll get transcription, character lists, and recap summaries on top of books you already own.

Pick: Bloox + Libation

I run an Audiobookshelf server at home and want native sync

Use ShelfPlayer or Plappa. They speak the Audiobookshelf API directly: progress, library, downloads, multi-user. Bloox does not yet sync directly with the ABS server — you’d have to sync the underlying files manually.

Pick: ShelfPlayer or Plappa

I run Audiobookshelf and also want AI transcription

Use ShelfPlayer/Plappa for daily listening, and Bloox as a secondary “reader” for books where you want transcription or a recap. You’ll need to import the M4B files into Bloox separately for now.

Pick: ShelfPlayer + Bloox as a companion

I have a folder of MP3s I ripped from CDs years ago

Drop them in iCloud or Google Drive and import to any of the file-based players. Bloox handles 10+ filename patterns and warns about gaps before they become playback surprises — useful for messy old CD rips. BookPlayer and Prologue are equally good choices for the playback itself.

Pick: Bloox, BookPlayer, or Prologue

I listen mostly before bed and fall asleep often

The recap and sleep timer combination is exactly why I built Bloox. Wake up, tap “What Did I Miss?”, get a 30-second spoken catch-up, continue listening.

Pick: Bloox

I’m on iOS 18 or older and can’t upgrade

Bloox’s AI features need iOS 26 + Apple Intelligence-capable hardware. On older devices, BookPlayer or Prologue will give you a solid playback experience without the AI layer.

Pick: BookPlayer or Prologue

I’m on Android

Bloox is iOS only. On Android, Smart AudioBook Player and Voice Audiobook Player are the most-recommended free players for your own files. For Audiobookshelf users, the official Audiobookshelf Android app is the obvious pick.

Pick: Smart AudioBook Player, Voice, or Audiobookshelf for Android

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