What this app is. What it isn’t. What you could build.

One-liner

A lightweight, open-source eBook reader for ePub and fb2 files with minimal UI and no cloud sync.

Strengths

Fast loading and smooth scrolling through large ePub files (review: 'opens books instantly, even 100MB ones')
Excellent support for complex ePub formatting including CSS and embedded fonts
No ads or in-app purchases—pure reading experience
Lightweight and runs well on older Android devices
Open-source with transparent development (GitHub repo visible)

Weaknesses

No cloud sync or cross-device book library (review: 'I can't access my library from phone and tablet')
Outdated UI feels clunky and not touch-friendly (review: 'buttons are tiny, hard to tap')
No built-in dictionary or text-to-speech (review: 'missing basic features like word lookup')
No search within books (review: 'can’t find a chapter I need')
No recent updates in over a year (review: 'feels abandoned')

Opportunities

Add cloud sync via simple self-hosted or GitHub-backed sync (e.g., encrypted book metadata)
Introduce a modern, gesture-based UI with dark mode and customizable font settings
Build a lightweight dictionary integration (offline or via API) for word lookup
Enable full-text search in books with instant results
Add TTS support with adjustable speed and voice selection

Build ideas

Competitors

AI-generated brief · 5/13/2026, 12:57:58 AM

First load takes ~10–30s while we generate the brief. Cached afterward.