Read along while listening to audiobooks with word-by-word synchronization
Create any sound for sleeping
Stage
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Founded
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Based in
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Pricing model
Free
Paid
Pricing
Free core features including read-along text, device transcription, offline functionality, and public-domain library. Optional Pro upgrade for advanced analytics.
One-time purchase with no subscription or in-app purchases.
Key features
Word-level synchronized text highlighting with 60fps
On-device transcription without cloud upload
Offline playback after single engine download
Support for 99 languages
Import multiple audio formats including MP3, M4B, FLAC, OGG
Accessibility profiles for dyslexia, ADHD, and vision impairment
Built-in library with 20k+ public-domain titles
Quote saving and sharing with generated cards
Reading analytics with neuroscience-based brain score
Character map feature for tracking book figures
Generate unlimited custom sounds from text descriptions
Twelve built-in classic sounds including white noise, rain, ocean, and thunderstorm
What makes it different
Complete privacy with no account or cloud uploads required
No external lyrics database; transcription generated directly from your audio
Supports your own audiobook files without DRM restrictions
No ads in core experience
Sounds generated on-device never repeat during one night, using multiple rotating takes over differently-timed background beds
No accounts, servers, or data collection—everything stays on your device and works offline
One-time purchase with no subscription, in-app purchases, or paywall
Sounds synthesized from descriptions rather than played from a fixed library
All features available immediately on first launch with full access to sound creation and customization
Sleep Drift