Cognito: AI Reading Companion

Transform reading into understanding. Ask questions, get instant answers from your books, and track your progress—all powered by AI on your device.

CONVERSE WITH YOUR BOOKS

Cognito is an ebook reader that helps you explore the books you read.

Ask questions about the text, generate summaries, and review key ideas directly from your book.

FEATURES

AI Chat & Quick Actions Ask questions about your book and get context-aware answers grounded in the text.

Quick actions include: • About This Book • Summarize • Key Points • Quiz Me

Smart Highlights & Notes Highlight passages, attach notes, and organize your highlights in one place.

Book Summary with Caching Generate summaries and reopen them instantly.

Universal Search Find passages across EPUB and PDF files.

Table of Contents Navigation Jump directly to chapters and sections.

Reading Insights Dashboard Track reading time, speed, streaks, totals, and top authors.

Reader Controls Adjust font size, spacing, margins, and themes.

EPUB Engine Native EPUB rendering powered by Readium.

Localization Available in 7 languages.

AI PROCESSING OPTIONS

Cognito supports two AI processing modes.

Apple Intelligence (On-Device) When available, AI processing runs entirely on the device.

Optional Cloud AI Users may optionally connect external language models using their own API key.

Only the text selected by the user and their prompt are sent for processing.

Books remain stored locally on the device.

API keys are securely stored in the iOS Keychain.

FREEMIUM MODEL

Start free with up to 3 books in your library.

Unlock unlimited books with a one-time Premium purchase.

IDEAL FOR

• Students and researchers • Professionals reading reports and technical documents • Book clubs and deep readers • Lifelong learners

Download Cognito and explore your books in a new way.