Sine: Audiobook Player MP3/M4B

Listen offline, sleep timer

Free · Designed for iPhone. Not verified for macOS.

Sine is an audiobook player for iOS — built for readers who listen. Import your own MP3, M4B, M4A, FLAC, and AAC files via Files, AirDrop, WiFi upload, URL download, or share extension. Then listen with the controls audiobook readers actually want: • Variable speed (0.5×–4.0×) with per-book memory • Chapter navigation and bookmarks with notes • Sleep timer with gradual fade and shake-to-resume • Smart rewind on resume • Folders, search, and custom drag-and-drop ordering for books and folders • 10-band equalizer with presets and a custom slot • Volume boost and normalization • Gesture mode (tap zones on artwork to control playback) • Dynamic player colors (tints from the book's artwork) • Lifetime listening stats with daily, weekly, and monthly charts • CarPlay and Apple Watch remote (both in beta) • Lock screen, AirPlay, and headset buttons • Interactive playback widgets, Siri Shortcuts, Spotlight search • Full VoiceOver accessibility SKIP SILENCE (BETA) Most audiobooks contain hours of silent gaps and trailing pauses — skip them automatically and save real time over the course of a book. Tune the sensitivity to your taste, see your lifetime savings, and listen faster without missing a word. Skip Silence is in beta: turn it on and it starts automatically when you play a book. PRIVACY-FIRST No Sine account required. No ads. Your library is stored locally. Optional usage analytics help improve the app: feature events, listening-time ranges, a random installation identifier, and app and OS versions. These analytics do not include book titles, file names, or audiobook content. You can turn off usage sharing in Settings. Built from scratch with SwiftUI, AVAudioEngine, and SwiftData. Zero third-party dependencies.

Ratings & Reviews

  • 4.8
    out of 5
    5 Ratings

This update improves audiobook playback and gives you more control over the player. • Clearer narration at increased playback speeds, including with Skip Silence enabled • A Mono Audio option for listening through one earbud • Adjustable playback-button sizes and separate text sizing • Choose which optional buttons appear in the player, with a preview that reflects your choices • CarPlay chapter updates and a Skip Silence button that stays in sync • Adaptive Smart Rewind with an adjustable maximum, based on how long you paused • English, Spanish, and Russian interface support, with some secondary text still in English • More balanced spacing between playback controls and the bottom buttons Read Along is temporarily unavailable while we focus on playback improvements.

Version 1.5.2

The developer, Dallen Burwell, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Dallen Burwell
Size
9.9 MB
Category
Books
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
  • Apple Watch
    Requires watchOS 10.0 or later.
Languages
English and 2 more
  • English, Russian, Spanish
Age Rating
4+
Copyright
© 2026 Dallen Burwell
  • Privacy Policy

    • More by Dallen Burwell

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