Riffle

An Android eBook reader designed for self-hosted AudioBookshelf servers.

Riffle lets you browse your ABS eBook library, read EPUB and PDF files, and sync your reading progress—all in a convenient and private Android app.

Functions

Reading

Programs for reading EPUB and PDF files

Contents Navigation

Searching for text inside a book

Chapter Map Progress Bar

Full screen mode for a fully immersive reading experience

Reading display

Advanced formatting controls (themes, fonts, size, spacing, margins, alignment).

Page-by-page and continuous scrolling modes, with page rotation in landscape orientation.

Change formatting options for each workbook

Navigate pages using volume keys

Leave the screen on.

Library

Support for multiple servers with the ability to control library visibility.

Browse by section: Home, Series, Collections and All books

Plex style cover with grid and detailed book description.

Switches “Read/Unread” and “To Read”

Search the full text library

Downloads and offline

Download for offline reading and get automatic caching when opened.

Download manager with bulk deletion function.

Detect offline devices and seamlessly read offline.

Server and synchronization

Login to Audiobookshelf with secure token storage and warnings about insecure connections.

Two-way synchronization of progress with conflict resolution based on the “last update wins” principle.

Periodic automatic synchronization and offline queuing.

Track reading session time

Requirements

Android 7.0 (API 24) or higher

Working audiobook server

https://github.com/pkmetski/riffle