# Cognito: AI Reading Companion — Chat with your books.

> Chat with your books. (iPhone/iPad app by Sergio Caiado.)

- Source: https://appshunter.io/ios/app/cognito-ai-reading-companion/id6758768054 (this page in markdown: same URL + `.md`)
- Developer: [Sergio Caiado](https://appshunter.io/developer/1820814906)
- Category: Books, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 11 MB
- Languages: Dutch, French (France), German (Germany), European Portuguese, European Spanish
- Released: 2026-03-09
- Data updated: 2026-07-09
- User reviews in markdown: https://appshunter.io/ios/app/cognito-ai-reading-companion/id6758768054/reviews.md

## What is Cognito?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium Unlimited | $4.99 | one-time |



## Version history (last 2 releases)

### 1.3.1 — 2026-03-17

**What's New in Version 1.3.1**

• Enables Premium Unlimited in-app purchase
• Minor improvements and fixes to ensure a smooth purchase experience

### 1.3 — 2026-03-09

No release notes.

## More apps by Sergio Caiado

- [AIMd Studio](https://appshunter.io/ios/app/aimd-studio/id6763743905)

All apps by Sergio Caiado: https://appshunter.io/developer/1820814906

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-09.*