Folio AI: PDF & Ebook Reader

Folio is a modern ebook reader and PDF reader for Android. Read EPUB, PDF, MOBI, AZW3 and comics on beautiful, distraction-free pages, highlight and take notes, listen with text to speech, and ask a built-in AI about any passage. Your library stays in sync across devices, encrypted. ★ ONE READER FOR EVERY BOOK FORMAT • EPUB reader and PDF reader, plus MOBI, AZW3, AZW, FB2, TXT, Markdown, DOCX and HTML • Comic reader for CBZ, CBR, CBT and CB7 • Open books straight from Files, Downloads or email with "Open with Folio" • Browse and download from OPDS catalogs • Reads offline; no account needed to read ★ A BEAUTIFUL LIBRARY • Cover grid, list and detailed views, with reading progress on every book • "Continue reading" picks up exactly where you stopped • Shelves, favorites and pin to top to organize a large collection • Filter by unread, reading and finished; search your whole library • Reading statistics to see your reading time ★ READING, YOUR WAY • Light, sepia, dark, black and auto themes: a night mode that's easy on the eyes • Text size, fonts, line spacing and brightness in one quick sheet • Scroll or turn pages; two-page spreads on tablets • Tap to hide every control for a clean, full-screen page • Full-text search inside books, contents, and bookmarks ★ HIGHLIGHTS, NOTES AND ANNOTATIONS • Highlight in color with one tap, add notes and bookmarks • Annotate and draw on PDF pages with a pen • Look up words in the dictionary, Wikipedia or the web • All highlights and notes in one place, with tags • Export notes and highlights to Markdown, CSV, HTML, PDF, TXT or JSON ★ AI READING ASSISTANT • Ask the AI to explain, summarize or discuss any passage • Translate selected text instantly • Summarize chapters to recall what you've read • Text recognition (OCR) makes scanned PDFs readable and searchable • Automatically recognize a book's title and author on import ★ LISTEN: TEXT TO SPEECH • Read aloud with your phone's built-in voices, even offline • Natural-sounding AI voices for long listening sessions • Turns any ebook into an audiobook, read sentence by sentence ★ SYNC AND BACKUP, PRIVATELY • Folio Cloud syncs books, reading position, highlights and notes across your phone, tablet and computer • Every account's data is stored in its own file and encrypted (AES-256) • Or sync to your own WebDAV or S3-compatible storage • Sync reading progress with KOReader • Back up and restore your whole library ★ PRIVACY BY DESIGN • No ads, no trackers, no analytics • Your books and notes stay on your device unless you turn on sync • Delete your account and all of its data at any time, in the app or on the web ACCOUNTS Reading, organising, annotating and offline read-aloud need no account. A free Folio account adds a monthly allowance of AI features, AI voices, text recognition and book information look-ups. Folio Cloud sync is included with Pro accounts. Folio is also available for Windows, macOS, Linux and the web, so your library follows you to every screen. Privacy policy: https://folio.armorclub.org/privacy Delete your account: https://folio.armorclub.org/delete-account