Reading shouldn’t cost you your attention or your wallet.
A full-featured offline reader and editor for Android: PDF and EPUB in one app, multi-colour highlights, margin notes and freehand drawing, bookmarks, full-text search, three reading themes and text-to-speech, with no ads in the way of the page.
Last reviewed · 28 Sep 2026Maintained by KalenuxSources: official product pages
PDF & EPUB Reader-Editor is a free, fully offline document reader and editor for Android developed by Kalenux.[1] It opens both PDF and EPUB files in one app, with annotations, bookmarks, three reading themes and text-to-speech, and works entirely offline, with no account and no ads between the reader and the page.[1]
The app handles both PDF and EPUB formats in a single reader, removing the need to switch between different apps depending on file type. The reading experience is optimised for long sessions, with adjustable fonts, three colour themes: white, sepia and night, and a clean interface that stays out of the way of the content.[1]
Beyond reading, a full annotation layer lets users highlight text in multiple colours, add margin notes, draw freehand and bookmark pages. Annotations are stored locally alongside the document, persist across sessions and work the same way in both formats.[1]
CHAPTER 2
History and motivation
Kalenux describes the e-reader category as a wall of apps that bury a simple act behind full-screen ads, subscriptions for basic features such as night mode or bookmarks, and permissions unrelated to opening a file. It built the reader on the view that a document reader does not need to track, nag or charge rent to show users their own files.[1]
“It respects the one thing every reader is really there for: the words on the page.”[1]
CHAPTER 3
Features
Feature
Detail
PDF and EPUB
Both formats rendered natively with fonts, images and layout preserved; no conversion
Reading themes
White, sepia and night with adjustable brightness; font size, family, line spacing and margins per document
Bookmark any page; reading position remembered across sessions
Table of contents
Jump to any chapter via PDF outlines or EPUB chapter structure
Full-text search
Results listed with context, each jumping to its occurrence
Text-to-speech
Read aloud with the device TTS engine; adjustable speed, pause/resume, chapter navigation
CHAPTER 4
Listening and accessibility
The built-in text-to-speech uses the device’s TTS system to read documents aloud, with speed control, pause and resume, and chapter-by-chapter navigation while listening: useful for accessibility and for working through long documents hands-free.[1]
CHAPTER 5
Offline by design
The app runs fully offline, and all annotations and reading positions stay on the device with the document. There is no account to create, no subscription, and no advertising between the reader and the page.[1]
CHAPTER 6
Reception
On the Kalenux product page, the reader holds an average rating of 4.6 across a moderated review set of 5.[3]
Perfect for research and annotating papers★★★★★
“Use it daily for reading academic papers. The annotation tools work well and syncing notes is straightforward. Replaced a paid app I was using before.”
Marta Kowalski, Warsaw, Poland · May 2026
Works great on low-end Android devices★★★★★
“Most PDF apps are heavy and crash on my older phone. This one is lightweight and fast. Never had a crash even with large files. Exactly what I needed.”
Bernard Osei, Kumasi, Ghana · May 2026
EPUB support is excellent★★★★★
“I read a lot of Korean-language ebooks in EPUB format and this reader handles them perfectly including right-to-left text and embedded fonts. Very impressed.”
We Value Your PrivacyWe use cookies to enhance your experience and analyze site traffic. By clicking 'Accept All', you consent to our use of cookies. our cookie and privacy policy
Cookie PreferencesChoose which cookies you want to allow. Essential cookies are required for the website to function properly.
Essential CookiesThese cookies are necessary for the website to function and cannot be disabled.Always Active
Analytics & Performance CookiesThese cookies help us understand how visitors interact with our website.
Kalenux