Coming soon
Every book you own,
on every screen
you read.
Particle Reader is an offline-first EPUB and PDF reader. Manage your library, sync your progress, highlights and bookmarks, track your reading habits and much more. Coming soon to iOS, Android and the web.

The reader
Tune the page to your eyes.
Typeface, size, spacing, margins, theme. Set it once, or book by book — either way, Particle remembers.
- Text
- Font, size, line height, word and letter spacing
- Page
- Columns, alignment, margins, hyphenation, light / sepia / dark
- Themes
- Save a set of settings and reuse it in any book

Highlights & notes
Highlights, notes and bookmarks.
Highlight in colour, attach a note, drop a bookmark.
- Highlight
- In colour, with a note attached
- Bookmark
- Anywhere in the book


Sync
Stop on one screen. Continue on the next.
Your place, highlights, notes, and settings move with you — phone to e-ink to browser and back. Offline-first: nothing waits on a network, and nothing is lost without one.



Integrations
Works with the tools you already use.
calibre
One-way sync of your calibre library into Particle — books plus title, author, series, ISBN and cover. Nothing is written back, and nothing is deleted behind your back.
KOReader
Browse and download your library on Kobo, Kindle, PocketBook, reMarkable and more. Positions, highlights and bookmarks sync both ways.
Statistics
Watch a habit form.
Reading time, words and pages, speed, sessions and streaks — across the whole library, and again for every book on its own. Quietly counted while you read.
- Time
- Reading time, sessions, average length
- Volume
- Words, pages turned, words per minute
- Streaks
- Current and longest
- Range
- Week, month, year, or all time
- Scope
- Your whole library, or one book on its own


Your library
Shelves, authors, series.
Group your library by bookshelf, author or series — or leave it flat. Filter by reading status, format or tag, and sort by title, author, date added or progress.
- Group by
- Bookshelves, author, series, or nothing
- Filter
- Reading status, format, tags
- Sort
- Recent, date added, title, author, progress

E Ink
Optimized for e-ink.
Animations off, high-contrast controls, no grey. Highlight colours and page themes render in black and white, and the volume keys turn pages.
- Rendering
- High contrast, animation off
- Colour
- Highlights and page themes in black and white
- Buttons
- Physical page-turn keys mapped

Start reading.
One library, on every device you read with.
Coming soon to iOS, Android and the web
Interested in testing? Drop us a message at hello@particle-reader.com