A beautiful, privacy-first ebook reader for Android — PDF, EPUB, MOBI, TXT, CBZ & CBR
If this project helped you, please ⭐️ star it. Also try OfflineLLM and Box — on-device AI apps built on the same privacy-first philosophy.
📱 Screenshots
 |
 |
 |
 |
 |
 |
 |
 |
- Six formats — PDF, EPUB, MOBI, TXT, CBZ & CBR all read natively
- Beautiful reader — swipe or scroll page turn, pinch-to-zoom, fullscreen mode, progress slider with configurable timeout, go-to-page, on-screen nav buttons
- PDF tools — fit page / fill width / fill screen modes, margin crop, high contrast (grayscale)
- Text customisation — font size (70–250%), font family, line spacing, side margins, 6 reading backgrounds (System / Light / Dark / Sepia / Green / Night), brightness control, blue light filter
- Neural TTS — fully offline text-to-speech via Sherpa-ONNX with 4 bundled Piper voices (Lessac, Ryan, Alan, Amy); sentence-level highlight while reading; auto-advances pages; speed & pitch control
- Table of Contents — chapter navigation for EPUB
- In-book search — full-text search across EPUB, MOBI & TXT
- Highlights & bookmarks — highlight text in four colours, bookmark any page
- Auto-scroll — hands-free reading at adjustable speed
- Foldable support — dual-page spread and tabletop modes for foldable devices
- E-ink mode — white/black only, no animations, optimised for e-paper displays
- Material You — dynamic colour from your wallpaper, or choose from 6 accent colours
- Collections — organise your library into groups
- Folder scan — import an entire folder of books in one tap
- No READ_EXTERNAL_STORAGE — file access via Storage Access Framework only
- Encrypted files — imported books stored as AES-256-GCM encrypted copies in private app storage when biometric lock is enabled; originals can be safely deleted
- Encrypted database — SQLCipher AES-256 for all metadata, bookmarks and highlights
- Biometric lock — fingerprint or PIN required to open the app
- PDF auth gate — require biometric or PIN before opening any PDF
- Inactivity lock — auto-locks after 5 minutes of inactivity
- Screenshot protection —
FLAG_SECUREblocks screen capture and app-switcher previews allowBackup=false— no cloud backup of your library or encrypted files- Privacy Sandbox blocked — all ad/tracking services explicitly denied in the manifest
- Auto-clear cache — delete temporary render data on every app close
- Download the APK from Releases
- Settings → Apps → Install unknown apps → allow your file manager
- Open the APK and tap Install
Requires Android 14+.
