The free ebook reader for Android that supports EPUB, PDF, MOBI, and 12+ formats. Powered by on-device AI for word explanations, summaries, and character tracking — plus offline translation in 40+ languages, text-to-speech, and a vocabulary builder. No ads, no trackers, 100% offline.
From AI-powered reading tools to fine-grained typography control — built for people who take reading seriously.
Run local AI models to explain words, summarize chapters, simplify text, track characters, and quiz your comprehension — all offline, all private.
EPUB, PDF, MOBI, AZW3, CBZ/CBR comics, FB2, DOCX, ODT, TXT, HTML, CHM, and Markdown. One reader for every book in your collection.
Offline ML Kit translation in 40+ languages with interlinear display. Built-in text-to-speech with speed control and voice selection.
Bookmarks with notes, color-coded highlights with tags, and floating notes. Export everything to PDF, JSON, Markdown, or CSV.
Collections, smart shelves with auto-filters, tags, series tracking, bulk operations, metadata editing, and automatic cover art fetch.
Reading heatmaps, daily streaks, achievement badges, reading goals with progress rings, and a Year in Review summary.
Download AI models directly to your phone. Every feature works offline with complete privacy.
Context-aware explanations of difficult words and phrases at basic, intermediate, or advanced levels.
Generate chapter or passage summaries automatically. Save them and review later to refresh your memory.
AI extracts characters, roles, aliases, and relationships. Keep track of who's who in complex novels.
Auto-generated questions per chapter to test your understanding. Track your comprehension over time.
Rewrite complex passages in simpler language. Adjust the comprehension level to match your needs.
Analyze the author's writing style, literary devices, tone, and historical/cultural context of passages.
Fine-tune typography, navigation, and reading aids to create your perfect reading environment.
Google Fonts integration, adjustable font size, weight, line height, letter spacing, paragraph spacing, and text alignment.
Light, dark, sepia, high-contrast, and custom themes. Color vision filters for protanopia, deuteranopia, and tritanopia.
Choose between no animation, fade, slide, or a realistic 3D page curl effect when turning pages.
Bold the first letters of each word to guide your eyes and increase reading speed with less effort.
A line guide to keep your place while reading, and focus mode that dims surrounding text for concentration.
Rapid Serial Visual Presentation mode displays one word at a time at 200-800 WPM for speed reading.
Reduce eye strain during nighttime reading with a customizable warm-tone blue light filter overlay.
Full-screen distraction-free mode. Two-column layout for wider screens. Hyphenation and drop caps toggle.
Dictionary, vocabulary builder, translation, and text-to-speech — everything you need for multilingual reading.
Look up words via Free Dictionary API, device dictionary, Wiktionary, or local StarDict files. All with one tap.
Saved words become flashcards with AI-generated example sentences. Learn with spaced repetition (SM-2 algorithm).
Kindle-style inline definitions for difficult words with adjustable difficulty levels (1-5). Learn vocabulary naturally.
Show translations line-by-line alongside the original text. 40+ target languages with ML Kit offline models.
Listen to your books with adjustable speed (0.5x–2x), voice and language selection, and a floating mini-player.
Context-aware translation that preserves literary intent and nuance — better than generic translators for books.
Powerful library management with cloud sync, OPDS catalogs, Calibre-Web, and more.
Create auto-filtered shelves by read status, format, progress, author, genre, or rating. Books organize themselves.
Manual collections, color-coded tags, and series tracking with reading order. Bulk edit multiple books at once.
Edit all book metadata. Auto-enrich with title, author, publisher, and description. Search and download cover art.
Browse and download from OPDS 1.x/2.0 feeds. Add custom catalogs with optional authentication.
Connect to your Calibre-Web server. Browse, search, and download books. Lazy download when you open a title.
Sync via Google Drive, Dropbox, or WebDAV. Full encrypted backups with one-tap restore. Hardcover integration.
Monitor folders on your device and auto-import new books as they appear. Skip duplicates automatically.
Subscribe to book blogs, Gutenberg releases, and custom RSS feeds. Save articles for later reading.
Build your personal reading archive and track your progress over time.
Highlight in 8+ colors with custom tags. Add floating notes anywhere. Search and filter your annotations.
Bookmark any page with optional notes and timestamps. Navigate quickly through all your saved positions.
Export all highlights, notes, and bookmarks to PDF, JSON, Markdown, or CSV for use outside the app.
Visualize your reading patterns with a calendar heatmap. Track daily stats, pages read, and time spent.
Set daily, weekly, or monthly goals by pages or minutes. Track streaks and earn achievement badges.
Annual summary of books read, pages turned, hours spent, top genres, and reading timeline.
Timers, converters, security, sharing, and everything else that rounds out the experience.
Set a 5–30 minute timer that gradually fades out and pauses your reading session automatically.
Built-in focus timer with work/break cycles (15–60 min work, 3–10 min break) and progress visualization.
Convert PDF books to EPUB format directly on your device with background processing and progress tracking.
Secure your library with biometric (fingerprint/face) or PIN unlock. Configurable lock timeout.
Share books with others via peer-to-peer. Browse community-shared books and download directly.
When you finish a book, rate it, write a review, and update your reading status — all in one prompt.
Connect your Hardcover account to sync reading status, ratings, and progress across platforms.
See how long it will take to finish your book based on your actual reading pace. Updates dynamically.
Download Shelfy Reader from Google Play and rediscover the joy of reading on your terms.
Download for Android