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Sine: Audiobook Player MP3/M4B

Sine: Audiobook Player MP3/M4B

Listen offline, sleep timer

4 ratings
3 reviews
📚 Books
Free

Details

  • Released
  • Updated
  • June 17, 2026
  • September 13, 2026

Features

Developer

Dallen Burwell
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About

This app allows you to import and listen to your own audiobooks in various formats. It offers advanced playback controls, chapter navigation, a sleep timer, and a unique silence skipping feature to save listening time. Your privacy is protected with no accounts or tracking.

✓Import MP3, M4B, M4A, FLAC, AAC files
✓Variable playback speed
✓Chapter navigation and bookmarks
✓Sleep timer with fade
✓Skip Silence feature
✓10-band equalizer
✓CarPlay and widget support
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+1

What's New in Sine

1.5.1

September 13, 2026

We’re now Sine—a new name for your audiobook player. This update adds more ways to listen and organize your library: • Keep the app responsive while opening large audiobooks, with Skip Silence preparing audio incrementally as you listen • Control playback from CarPlay (beta), with skip controls, speed presets, and Skip Silence • Use the new Apple Watch remote (beta) for play/pause and forward/back controls • Add custom artwork to books and folders, then crop and zoom it to fit • Refresh your library to remove stale entries after files are renamed or edited • Finished books now have gray covers, muted titles, and a subtler completion badge • Fixes a crash affecting audiobooks longer than 40 hours, plus additional playback improvements Thanks for listening!

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User reviews

Most RecentHighest RatedLowest Rated

Editing book covers

I’m loving this app so far, but would love to edit the covers
maryasaumaryasau

Ticks all the boxes

this app does it all. I especially enjoy the equalizer, it is so nice to be able to roll some treble off of the narrator‘s voice at night time to make it sound a little more muffled into my ears. This app is a keeper, give it a try.
CHOCOBASCOCHOCOBASCO

Response from developer

Glad to hear you’re enjoying the equalizer! Thanks for the review, Happy listening!

I can get through a book so much faster!

The feature that lets me trim out the long silences reduces the listening time by so much! I saved almost 2.5 hours using the balanced mode!
LaXative14LaXative14

Response from developer

Glad to hear you like the app! Hope you keep saving yourself time. Happy Listening!

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FAQ

What file formats does Audiobook Player support?

Audiobook Player supports importing and playing MP3, M4B, M4A, FLAC, and AAC audio files. This allows for a wide range of personal audiobook collections to be used within the app.

Can I listen to audiobooks offline with Audiobook Player?

Yes, Audiobook Player is designed for offline listening. Once your audio files are imported via methods like Files, AirDrop, or WiFi upload, you can listen to them without an internet connection.

Does Audiobook Player have ads?

No, Audiobook Player is ad-free. The developer emphasizes a privacy-first approach, and the app does not contain advertisements, ensuring an uninterrupted listening experience.

How does the 'Skip Silence' feature work in Audiobook Player?

The 'Skip Silence' feature automatically detects and skips silent gaps and trailing pauses in audiobooks, saving you listening time. You can tune its sensitivity to your preference and see your lifetime savings.

Is Audiobook Player available on Android devices?

Currently, Audiobook Player is built for iOS devices only. It is designed to work with iPhones and supports features like CarPlay.

What is the age rating for Audiobook Player?

Audiobook Player has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions.

How often is Audiobook Player updated?

The latest version of Audiobook Player was released on August 1, 2026, with version 1.2. While specific update frequency isn't detailed, this indicates active development and recent improvements.

Does Audiobook Player offer a free trial?

Audiobook Player is completely free to download and use. There is no cost associated with accessing its features, and it does not require a subscription or offer paid upgrades.