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Nook vs CardGo.AI

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Nook compared with CardGo.AI
DetailNook logo NookCardGo.AI logo CardGo.AI
What it doesA Chrome extension that helps you stay focused, keep your place, and finish reading articles AI context cards for ChatGPT, Claude, Gemini, Perplexity and Grok
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree trial Freemium
PricingFree trial with full access to all features, no credit card required. After trial: $5/month or $39/year. Free plan: $0 forever, 7 cards, CardGo AI: 10 messages and 10 hosted analyses a day. Pro plan: $9.90 per month, 50 cards, CardGo AI: 100 messages and 100 hosted analyses a day. Max plan: $19.90 per month, Unlimited cards, CardGo AI: 300 messages and 300 hosted analyses a day.
Key features
  • Autopace: guided reading that moves at your rhythm
  • Bionic reading mode for faster word recognition
  • Paragraph and line chunking to break down text walls
  • Seven specialized fonts including OpenDyslexic, Lexend, and Atkinson Hyperlegible
  • Calm background colors to reduce eye strain
  • Distraction-free reading mode
  • Works on any website, EPUB, or PDF
  • No ads or interruptions
  • Reading progress syncs across devices
  • Save context once as encrypted cards with seven sections
  • End-to-end encrypted with AES-256-GCM
  • Works with ChatGPT, Claude, Gemini, Perplexity and Grok
  • Sync across devices
  • Card suggestions while typing
  • Create multiple context cards with different details
  • Filter sensitive details before sharing
  • Dream cards feature to auto-generate card suggestions
What makes it different
  • Built specifically for ADHD brains, not generic readers
  • Research-backed features grounded in peer-reviewed studies
  • Every feature designed to reduce mental effort, not add to it
  • 30-day money-back guarantee
  • Cancel anytime with no questions asked
  • One card works across five different AI services
  • Eliminates need to re-explain context to each AI chat
  • No credit card required to start
  • Context attached only when you choose
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)2 no change since last check3 no change since last check
Trust Flow (Majestic)40
Citation Flow (Majestic)2326
Referring domains (Majestic)1441

5 details filled in for both companies.

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