Lumen — EPUB & PDF Reader

kryptow

About this app

Lumen — a modern EPUB and PDF reader for Android. Read your ebooks,
highlight passages, take notes, and listen with text-to-speech.
Ad-free, privacy-first, and entirely under your control.

📚 WHAT IS LUMEN?

Lumen is a modern Android ebook reader that brings EPUB and PDF
reading together in one beautifully designed app. Whether you're
diving into a novel or studying academic PDFs, Lumen organizes your
library, preserves your reading habit, and makes every reading
session feel personal.

✨ WHY CHOOSE LUMEN?

• One app for both EPUB and PDF
• No account required
• Works offline
• Available in English, Turkish, and Spanish
• Modern, fluid Material Design 3 interface

📖 EPUB READER

A fully featured ebook reader supporting EPUB 2 and EPUB 3:
• Automatic table of contents
• Choose between page turn or vertical scroll
• Chapter navigation, page numbers, progress percentage
• High-quality typography rendering

📄 PDF SUPPORT

More than just a reader — a powerful PDF viewer:
• High-resolution rendering for all PDF documents
• Pinch-to-zoom up to 5x
• Swipe to turn pages
• Full-text search inside PDFs
• Automatic cover thumbnails

🎨 CUSTOMIZE YOUR READING

Lumen gives you control over every aspect of your reading experience:
• 5 font families: Serif, Sans-serif, Monospace, Cursive, System
• Font size, line height, and margin adjustment
• Day / night / auto theme mode
• 3 day themes: White, Cream, Light Blue
• 3 night themes: True Black, Dark Gray, Sepia
• Automatic night mode (time-based)
• Keep screen on while reading

🎧 READ ALOUD (TTS)

Listen to your books with built-in text-to-speech:
• Uses your device's local TTS engine
• Adjustable reading speed
• Chapter-by-chapter playback control
• Control from notification panel
• Bluetooth headphones and car audio support

🚗 ANDROID AUTO INTEGRATION

Listen to audiobooks in your car — full Android Auto support lets
you access your library safely while driving. Change chapters, pause,
resume — all from your car's display.

✏️ HIGHLIGHTS & NOTES

Professional tools for smart reading:
• 5 highlight colors
• Add custom notes to any highlight
• View all notes in one screen
• Filter by chapter
• Export and share as TXT

🔍 IN-BOOK SEARCH

Full-text search for both EPUB and PDF:
• Instant results as you type
• Chapter/page-grouped result list
• Highlighted match previews

📚 LIBRARY MANAGEMENT

All your books in one place:
• Grid or list view
• Favorites, Recent, and All books tabs
• Quick search
• Beautiful cover art display
• Folder scanning — import an entire collection at once
• Automatic reading progress tracking

📖 DICTIONARY & TRANSLATION

Stay in flow while reading in a foreign language:
• Select any word → instant definition
• Multi-language translation
• Learn new words without breaking your reading

🛡️ PRIVACY FIRST

Lumen keeps your data on your device:
• No ads
• No analytics
• No account required
• Your books, highlights, and notes never leave your device
• Optional internet only for dictionary/translation

📁 SUPPORTED FORMATS

EPUB 2 • EPUB 3 • PDF

📲 WHO IS LUMEN FOR?

Lumen is built for serious readers, students, researchers, and
anyone looking for a modern EPUB and PDF reader. If you're searching
for a Kindle alternative, a Moon+ Reader replacement, or simply a
beautiful PDF viewer, you've found it.

Download Lumen today, add your first book, and rediscover the joy
of reading.

What’s new

First Release