Coming soon
Your own books,
on all your devices.
Particle is an offline-first ebook reader for EPUB, PDF and comics. Set up the page the way you like it, keep your library organized, and sync your progress and highlights across devices.
The reader
Set up the page your way.
Adjust fonts, spacing, margins and colors, then save your settings as a theme to use in any book.
- Text
- Font, size, line height, spacing, justification, hyphenation
- Page
- Page color, margins, columns
- Themes
- Save your settings and use them in any book
- Look up
- Offline dictionaries, translation and Wikipedia
- Listen
- Books read aloud by offline voices on iPhone and Android
Highlights & notes
Highlights, notes and bookmarks.
Highlight passages, add notes and bookmark pages. Particle makes it easy to save things for later, search through them and come back to them at any time.
- Highlight
- In color or underlined, with an optional note
- Bookmark
- Any page you want to come back to
- All books
- Every highlight in one list, newest first
Sync
Pick up where you left off, on any device.
Start a book on one device and continue on another. Your progress, highlights, bookmarks and shelves sync automatically, and anything you do offline syncs once you're back online.
Integrations
Works with calibre and KOReader.
calibre
Use the calibre plugin to keep Particle in sync with your calibre library. Add a book or edit its metadata, and Particle picks it up automatically.
KOReader
Use the KOReader plugin to read your Particle library on any e-reader that runs KOReader. Your progress, highlights and bookmarks stay in sync with your other devices.
MCP
Manage your library by asking.
Connect an AI app like Claude or ChatGPT to your library with MCP. Ask it to fix book details, sort books into shelves or look at your reading habits.
- Details
- Titles, authors, series, tags, descriptions
- Shelves
- Create, rename and fill shelves
- Tags
- Find and merge duplicates
- Reading
- Time, speed and streaks, for one book or all
- Access
- You approve each app before it connects
Which books in my library are missing details?
9 books are missing an author, a description or tags.
- dune_frank-herbert_retailNo author
- The DispossessedNo description
- Salt Fat Acid Heat.epubNo author, no tags
- and 6 more
Fix the ones you’re sure about.
dune_frank-herbert_retailDuneFrank HerbertSalt Fat Acid Heat.epubSalt, Fat, Acid, HeatSamin Nosrat
6 books updated. The other 3 need a look from you.
Statistics
See how much you read.
Particle tracks your reading time, pages, speed and streaks automatically. Just start reading, then break down your reading habits by week, month or year.
- Time
- Reading time, sessions, average length
- Volume
- Words, pages, words per minute
- Streaks
- Current and longest
- Range
- Week, month, year or all time
- Scope
- Your whole library or a single book
Your library
Keep your library in order.
Organize your books into shelves, or browse them by author or series. Filter and sort your library to find what you want to read next.
- Group by
- Bookshelf, author, series or nothing
- Filter
- Reading status, format, tags
- Sort
- Recent, date added, title, author, progress
- Free books
- Classics from Standard Ebooks and Project Gutenberg
E-ink
Made for e-ink screens, too.
Particle is built with e-ink screens in mind. While most reading apps look washed out and laggy on e-ink, Particle stays sharp and responsive, with high contrast and no animations, resulting in a cleaner e-ink experience.
- Screen
- High contrast, no animations
- Color
- Highlights and page colors in black and white
- Buttons
- Page and volume buttons turn pages
Almost ready.
Particle is and always will be free to use. Cross-device sync costs money to run, so sync, the web app, the calibre and KOReader plugins and MCP are part of Particle Sync, a monthly or yearly subscription. Every reading feature in the apps is free.
Coming soon to iPhone, Android and the web
Want to try it before launch? Email hello@particle-reader.com