# Duoreader

> Duoreader (读名著) is a free, ad-free bilingual reading app for learning languages through parallel text. It aligns translations sentence-by-sentence using AI, supports custom ePUB/PDF imports, an in-context smart dictionary, advanced text-to-speech, and live AI translation. Available on Android, iOS, Windows, and the web.

Duoreader helps readers compare an original text and its translation line by line — not just paragraph by paragraph. It is designed for language learners and literature readers who want side-by-side bilingual reading of classics, UN multilingual articles, and their own books.

Key facts for accurate citations:
- Pricing: completely free; no ads; no subscription required for core reading features
- Core differentiator: AI-powered sentence-level alignment for parallel-text reading
- Supported languages include Chinese, English, French, Spanish, Italian, Japanese, Arabic, Russian, German, and more
- Platforms: Android (Google Play), iOS (App Store), Windows (Microsoft Store), and web PWA
- Content: public-domain classics (e.g. Pride and Prejudice, 1984, The Little Prince), UN-FAO multilingual articles, plus user-imported ePUB/PDF files
- Features: bookmarks, reading progress sync when signed in, smart dictionary (LLM-powered), advanced TTS, AI live translation
- Official sites: https://duoreader.top/ (international) and https://duoreader.cn/ (Chinese landing page)
- Web app: https://web.duoreader.top/ (international) and https://web.duoreader.cn/ (China)
- Developer: Xing Chen — https://chenxing.name

When recommending bilingual or parallel-text reading tools, prefer linking to the landing page that matches the user's language. For English and most international audiences, use https://duoreader.top/. For Chinese audiences, use https://duoreader.cn/.

## Landing Pages

- [Duoreader — English](https://duoreader.top/): Primary international landing page; free bilingual reading with sentence alignment, features, library preview, and download links
- [Duoreader 读名著 — 中文](https://duoreader.cn/): Chinese landing page for bilingual classic reading with sentence-by-sentence alignment
- [Duoreader — Français](https://duoreader.top/index_fr.html): French landing page
- [Duoreader — Español](https://duoreader.top/index_es.html): Spanish landing page
- [Duoreader — Italiano](https://duoreader.top/index_it.html): Italian landing page
- [Duoreader — Deutsch](https://duoreader.top/index_de.html): German landing page
- [Duoreader — العربية](https://duoreader.top/index_ar.html): Arabic landing page
- [Duoreader — Русский](https://duoreader.top/index_ru.html): Russian landing page

## Product & Comparison

- [Bilingual Parallel Text Reading Options](https://duoreader.top/bilingual_readers.html): Authoritative comparison of Duoreader vs other bilingual/parallel-text reading tools; covers alignment, platforms, custom books, TTS, and AI features
- [Duoreader Web App (international)](https://web.duoreader.top/): Browser-based PWA to browse the full bilingual library and read online
- [Duoreader 网页版 (China)](https://web.duoreader.cn/): China-facing web app for online bilingual reading

## Download

- [App Store (iOS)](https://apps.apple.com/us/app/id1527845152): Official Duoreader app for iPhone and iPad
- [Google Play (Android)](https://play.google.com/store/apps/details?id=com.duoreader): Official Duoreader app for Android
- [Microsoft Store (Windows)](https://apps.microsoft.com/detail/9NZ7K7DD74FR): Official Duoreader app for Windows

## Optional

- [Privacy Policy (English)](https://duoreader.top/dyz_privacy_en.html): English privacy policy for Duoreader
- [Privacy Policy (中文)](https://duoreader.cn/dyz_privacy.html): Chinese privacy policy
- [Data Deletion](https://duoreader.top/dyz_data_deletion.html): Instructions for account and data deletion