Noctium: Ebook & Audiobook

About Noctium: Ebook & Audiobook

Noctium is a beautifully crafted ebook and audiobook reader for Android, built for people who take reading seriously but want their library to feel effortless. No bloat, no social feeds, no account required. Just your books, beautifully read and heard.

FORMATS SUPPORTED
- EPUB, PDF, MOBI, AZW, AZW3, FB2: all major ebook formats
- Markdown, HTML, DOCX, and plain text
- CBZ comic archives, with right-to-left flow for manga
- M4B, M4A, MP3 audiobooks with chapter navigation

SELF-HOSTED LIBRARY INTEGRATION
Connect directly to the services you already run:
- Audiobookshelf, with streaming, downloads, and two-way progress sync
- Kavita and Calibre-Web via OPDS
- Any generic OPDS catalog (Project Gutenberg included)

Stream or download. Your credentials are encrypted on your device, and there is no account to create because we run no library servers of our own.

READING POSITION SYNC
- Two-way progress sync with Audiobookshelf
- Share your reading position with KOReader and kosync servers (percentage based)

FREE PUBLIC DOMAIN LIBRARY
Browse and download from Project Gutenberg and LibriVox, right inside the app. Tens of thousands of classic ebooks and audiobooks, free forever, no account needed.

MATERIAL 3 DESIGN
- Dynamic color that follows your wallpaper on Android 12+
- Thoughtful light and dark themes, plus a custom theme builder
- Adaptive layouts for phones, tablets, and e-ink devices
- Edge-to-edge immersive reading mode

READING EXPERIENCE
- Fine-grained control: font family, size, line height, margins, alignment, paragraph spacing
- Built-in bionic reading mode
- Line-focus reader for dyslexia-friendly reading
- Text-to-speech read-aloud with word-by-word highlighting
- Warm-tint night mode for late reading sessions
- Page-turn animations, or none for e-ink
- Reading themes: sepia, solarized, high contrast, and more
- Keep-screen-on toggle

AUDIOBOOK PLAYER
- Variable playback speed from 0.5x to 3.0x
- Skip silence for faster listening
- Smart rewind on resume
- Sleep timer with a gentle fade-out
- Media controls in the notification and on your lock screen
- Background playback

LIBRARY AND READING TOOLS
- Favorites and format badges
- Reading statistics: time, pages, streaks, daily goals
- Bookmarks, highlights, and annotations, local only, never synced without your permission
- Built-in offline dictionary lookup while reading
- Vocabulary list of words you have looked up, with flashcard review
- Home screen widget for your current book

PRIVACY FIRST
- Everything lives on your device by default
- Optional Google Drive backup, saved to your private App Data folder, invisible to other apps
- Opt-out analytics and crash reporting in Settings
- We run no library servers and we do not sell your data
- The free version shows ads through Google AdMob; you control ad personalization any time in Settings
- Remove every trace of your data whenever you want, from Settings

GO AD-FREE
The free version shows discreet ads, never on the reading or audiobook player screens. A one-time Premium upgrade removes ads permanently.

OPEN FORMATS, NO LOCK-IN
No proprietary file format. No walled garden. Import a book, export a backup, take it with you.

Noctium is developed by Obelisk Agency in Romania. We build focused tools for people who want software to respect their time and their data.

Privacy policy: https://obelisk.agency/noctium/privacy
Terms: https://obelisk.agency/noctium/terms
Delete your data: https://obelisk.agency/noctium/delete-data

Questions? [email protected]