LysnBox
Turn books, PDFs & articles into audiobooks, fully offline
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LysnBox reads your EPUBs, PDFs, web articles and pasted text aloud with natural AI voices that run entirely on your iPhone. No cloud, no API keys, no subscription: speech is synthesized live on the Apple Neural Engine in 31 languages. Follow along with word-level highlights, resume exactly where you left off, and control playback from the lock screen or Bluetooth headphones. Free on the App Store and open source (MIT).
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PH · launched Oct 19, 2026 · 2 upvotes (top 22%)
- Media & entertainment
- Content generation
- B2C
- AI feature
- Commercial product
- iOS
- GitHub
- Books
- Audio
Similar launches
See all 482 similar launches →Could you build this?
Partial While an iOS app with document parsing and reading UI is vibe-codeable, running high-quality offline neural TTS across 31 languages directly on Apple Neural Engine without severe latency, memory bloat, or battery drain requires specialized CoreML/whisper/piper quantization and model optimization.
What it would actually take: Building this requires a Swift/SwiftUI iOS architecture integrating PDFKit and EPUB parsing libraries with an on-device inference pipeline. The hardest component is exporting and quantizing multilingual natural TTS models (like VITS, Piper, or Kokoro) to CoreML and tuning their graph execution to run smoothly on the Apple Neural Engine. Developers need deep expertise in CoreML, audio buffer streaming, and mobile ML performance optimization.
Competitors
Other products that read as similar to this one : 482 launches clear the similarity bar, closest 8 shown.
Attention rank: #104 of 483 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 347 days after the earliest competitor.
- Mi Speaks 2.0 · ph · 2026-10-13 · 84 upvotes · similarity 0.66
- Sandbook · ph · 2026-10-09 · 3 upvotes · similarity 0.66
- I built an iOS app that turns EPUBs into audiobooks · hn · 2026-02-24 · 6 upvotes · similarity 0.62
- Heard for iOS: ePub reader with on-device text to speech · hn · 2026-07-15 · 5 upvotes · similarity 0.59
- Hearby · ph · 2026-10-29 · 2 upvotes · similarity 0.56
- Lumotext - Text-to-Speech Reader · ph · 2026-10-25 · 2 upvotes · similarity 0.53
- SnowReader · ph · 2026-09-09 · 2 upvotes · similarity 0.52
- OBook Text To Speech · ph · 2026-09-26 · 5 upvotes · similarity 0.52
Other launches for this product
- No other launches for this product.