Sutra — eBook Reader

Text highlights, Series from Kavita or Calibre auto-group into collections. Connect any OPDS server or Project Gutenberg — all free, no subscriptions.

Sutra is the best way to read your books — all of them, in one app.

Connect your self-hosted Kavita or Calibre server, any OPDS catalog, Project Gutenberg's 75,000+ classics, or Standard Ebooks' curated collection. Your entire library appears in a beautiful cover-grid with series info, search, collections, and offline downloads. Everything you need to read, discover, and organize your books — all free, all the time.

THE READING EXPERIENCE YOU DESERVE • Gorgeous EPUB and PDF reading with an authentic page-curl you can tap or drag like turning a real book • Rich typography control: fonts, size, line spacing, alignment, bold text • Four carefully-designed reading themes to match your mood • Bookmarks, in-book search, and color-coded highlights that sync via iCloud • Full-screen reading, offline downloads, and progress syncing across devices

MARK YOUR PASSAGES • Select text and highlight it in four colors — all synchronized via iCloud • Search your highlights across all books from Settings or the reader • Change colors or delete anytime — highlights stay in sync everywhere

EVERYTHING IN SYNC • Kavita libraries: page-accurate progress syncs both ways with your server • iCloud: reading position, bookmarks, and highlights sync across iPhone, iPad • Automatic: no setup needed, no manual backups, works offline

PERSONALIZED READING • Day, Night, or System appearance — a real dark theme for the whole app • Left-Handed Page Turns for comfortable one-handed reading • Reduce Motion support and accessibility-first design • Favorites, collections, and smart sorting (by series, date read, title) • Storage manager to free space with one tap

BUILT FOR SELF-HOSTERS • Connect any OPDS server: Kavita, Calibre, Grimmory, Booklore, or your own • Series from Kavita or Calibre auto-group into browsable Collections — perfect for long fantasy or sci-fi runs • Works with local network servers — no cloud storage, no middleman • Search all your libraries at once or narrow down to one

Sutra is free - every feature, every library, no in-app purchases, no subscriptions, no ads. Your books are always yours.