Cool Reader GL

What if your Android device could read any ebook aloud in a natural voice, exactly the way you like?

Cool Reader GL transforms your smartphone or tablet into a full-featured ebook reader and audiobook player. Whether you commute, exercise, or just want to rest your eyes, this app converts text from EPUB, FB2, TXT, PDF, and many other formats into clear, customizable speech. Beyond text-to-speech, you get a complete reading environment with night mode, gesture controls, and full dictionary integration.

Core Reading & Listening Tools

• Multi-format ebook engine – Opens EPUB, FB2, MOBI, PDF, TXT, RTF, HTML, DOC, and ZIP archives directly from your device or cloud storage.
• Text-to-speech with TTS engine – Uses Android’s built-in speech synthesizer or third-party TTS engines (like Google TTS, eSpeak, or SVOX) to read any book aloud. Pause, rewind, skip paragraphs, and adjust reading speed from 0.5x to 3.0x.
• Customizable visual reading – Choose from 8+ font families, adjustable font size (10–72pt), line spacing, margins, and background color (white, sepia, black, or any custom hex color).
• Night mode & screen dimming – One-tap toggle for inverted colors or pure black background with white text. Reduces eye strain during low-light reading.
• Gesture & hardware button controls – Tap left/right screen edges to turn pages. Swipe up/down for brightness. Assign volume keys to page forward/backward, TTS play/pause, or bookmark toggle.

Key Advantages

• No cloud dependency – All books stay on your device. No accounts, no sync, no data collection. Works fully offline.
• Extreme Android compatibility – Runs on Android 2.1.x (Eclair) through Android 14. Also works on Fire OS, LineageOS, and custom ROMs.
• Automatic text reflow – Renders PDF and DJVU documents with text reflow for small screens. Fonts are antialiased for crisp readability.
• Bookmarks & reading progress – Auto-saves position per file. Manually add bookmarks with notes. Resume exactly where you left off.
• Low resource footprint – App size under 5 MB. No background services, minimal RAM usage (typically <20 MB). No ads, no trackers.

Key Features at a Glance

• Supports EPUB, FB2, MOBI, PDF, TXT, RTF, HTML, DOC, and ZIP archives.
• Text-to-speech with adjustable speed (0.5x–3.0x) and voice selection.
• Night mode, sepia mode, and custom background colors.
• Gesture controls: tap, swipe, volume keys, and long-press actions.
• Bookmarks, auto-scroll, and reading progress persistence.
• Font size from 10pt to 72pt, 8+ font families, line spacing control.
• Full offline operation – no internet required after installation.
• Runs on Android 2.1.x and newer – no unnecessary permissions.

Consider downloading Cool Reader GL

You might enjoy this app if you read ebooks daily, need a reliable text-to-speech solution, or prefer a lightweight reader without ads or cloud accounts. It works on old and new Android devices alike, and gives you full control over how text looks and sounds.

Technical Disclaimer

This app requires an active internet connection only for downloading third-party TTS voices or dictionary data. All core reading and text-to-speech functions operate fully offline. The app contains no in-app purchases. No user data is collected, transmitted, or shared with third parties.