Octavo

Read the books on your own server, on a phone that opens like a book.

Free and open source. No accounts, no subscriptions, no tracking.

Download on the App Store Source on GitHub

Opens like a book

One page folded, two pages open, and a real spread with a shadow at the spine when half open. Your place holds as you move between them.

One page of Pride and Prejudice on the folded iPhone Duo.
Folded: one page
Two pages on the unfolded iPhone Duo.
Open: two pages
The Count of Monte Cristo's page on iPhone, 17% read and synced just now.

Keeps your place

With BookOrbit, your place stays synced with its web reader and other apps. With KOReader sync, EPUBs keep their place with KOReader on your other devices.

A page of Don Quixote on iPhone with a footnote's text in a card over the top.

Lets you look something up

Jump to a map or a glossary, then tap back. Your place doesn't move until you settle somewhere new. Footnotes open over the page.

Gitanjali in the Night theme on iPhone, with the Text and Theme card open.

Reads your way

Four themes, fonts, text size, line spacing, margins and page turns. Contents, bookmarks and search in the book, and a scrubber that zooms in to one page at a time.

Works with

BookOrbit

Your library, with your place and bookmarks synced.

OPDS catalogs

Browse, search and download. Checked against Calibre-Web, COPS, Kavita and Komga.

Files

Import EPUB, MOBI, AZW3 or FB2, or open them in Octavo from another app.

KOReader sync

Your place in EPUBs, kept with KOReader on your other devices.

Add as many servers and catalogs as you like. Octavo doesn't sell books or come with a catalog, and it can't open files with DRM, PDFs or comics.

On iPhone and iPad too

Built for iPhone Duo first. The same app runs on any iPhone or iPad.

A BookOrbit library on iPad, with rows of covers for All, Recently added, Series and Authors. The same library on iPhone.

Private

Books and sign-ins stay between your device and your server. Passwords go in the Keychain, plain http only goes to home and VPN addresses, and self-signed certificates work once you trust them.