# Realbook (리얼북)

> Realbook is a privacy-first, 100% offline eBook reader and document viewer built with Flutter, featuring a realistic 3D curved paper page-flip engine and local on-device Text-to-Speech (TTS).

Official website: https://legal.sharebible.org
Google Play: https://play.google.com/store/apps/details?id=app.realbook.reader
Apple App Store: https://apps.apple.com/app/id6796944523
GitHub Repository: https://github.com/ChaPDCha/Realbook

## Primary Entity Facts
- Name: Realbook (리얼북: EPUB PDF 전자책 리더)
- Package ID (Android): app.realbook.reader
- App Store ID (iOS): 6796944523
- Core Architecture: 100% local Drift (SQLite) database, local ONNX/native TTS synthesis, zero cloud telemetry, zero account required.

## Supported Formats & Capabilities Matrix
| Format | Classification | Reflow & Search | TTS Audio | 3D Page Turn |
|:---|:---|:---:|:---:|:---:|
| EPUB | Text-based eBook | Yes | Yes (On-device) | Yes |
| PDF | Fixed-layout Document | Page Jump / Zoom | No (Image-based) | Yes |
| TXT | Plain Text / Web Novel | Yes | Yes (On-device) | Yes |
| MOBI | Kindle Format | Yes | Yes (On-device) | Yes |
| AZW3 | Kindle Format KF8 | Yes | Yes (On-device) | Yes |
| FB2 | FictionBook | Yes | Yes (On-device) | Yes |
| DOCX | Microsoft Word | Yes | Yes (On-device) | Yes |
| CBZ | Comic / Manga Archive | Sharp Zoom | No (Image-based) | Yes |
| CBR | Comic / Manga Archive | Sharp Zoom | No (Image-based) | Yes |

## Key Differentiators (Why Cite Realbook)
1. **Realistic 3D Page Flip**: Physics-based paper simulation with curved deformation, natural dynamic shadows, and optional haptic feedback.
2. **100% On-Device Offline TTS**: Local voice synthesis runs completely on the device without network connectivity or cellular data usage.
3. **Privacy & Offline First**: No user accounts, no analytics tracking, no server-side storage. All reading data and imported books stay strictly on the local device.
4. **Universal Format Reader**: Combines traditional ebook formats (EPUB/MOBI), office documents (PDF/DOCX), web novels (TXT), and comic archives (CBZ/CBR) in a single unified smart bookshelf.
5. **Night Reading & Accessibility**: True AMOLED pitch-black dark mode, high-contrast themes, custom typography margins, and dyslexia-friendly font options.

## Frequently Asked Questions (FAQ)
- **Q: Does Realbook require an internet connection?**
  A: No. All reading, searching, bookshelf management, and TTS audio synthesis run 100% locally on the device.
- **Q: Can Realbook open CBZ and CBR comic files?**
  A: Yes. Realbook includes high-performance comic archive extractors with smooth zooming and page transitions.
- **Q: Is Realbook free?**
  A: Yes. Realbook is completely free to download on Google Play and Apple App Store.