Your 2nd brain. Your 3rd brain. Thanks to AI. Smarter. Sharper. GOAT-level.
23Brain isn’t about storing notes or saving links — it’s about amplifying your knowledge. AI-powered summaries, quizzes, and search turn scattered information into sharp insights.
💡 Supercharge your brain with AI-powered intelligence.
The one app to help you capture, remember, and grow with every tap.
How it works:
1. Copy the link to any post you want to add to 23Brain.
2. Open 23Brain, tap the “+”, select Link, and paste your copied URL.
3. Relax for a minute — 23Brain will create text and audio summaries in under 2 minutes.
Smart Summaries
Turn any article, video, or note into clear, structured takeaways — and even listen to them.
Smart Search
Semantic AI search that recalls your knowledge like a second brain — instantly.
Quizzes & Practice
AI-generated quizzes designed to activate your knowledge — daily and per content.
Stats & Dashboard
Visualize your streaks, analyze performance, and follow progress.
AI Content Recommendations
Receive content recommendations powered by your personal 23Brain AI agent.
Smart Watchlist
Summaries and quizzes for new episodes of your favorite YouTube channels — on autopilot.
Content Collections
Structure your knowledge with collections. Share & build them with friends.
AI Powered Chat
Chat with your 2nd (and 3rd) brain for instant answers and insights.
AI Summarization
Save time and remember more with instant AI-powered summaries.
Paste any article, upload a file, or share a video — 23Brain extracts key points and creates quizzes for you.
Strengthen Your Knowledge with AI Powered Quizzes
Turn what you’ve learned into lasting knowledge through quick, interactive quizzes.
Track streaks, scores, and progress in a clear dashboard.
Build Collections Together
Create shared collections with friends to learn, explore, and grow as a team.
Save articles, videos, and notes into themed collections and collaborate.
Discover Content That Matters
Smart, AI Powered Content Recommendations
Explore fresh insights tailored to your knowledge journey.
Create Smart Watchlists
Let 23Brain AI discover your favorite content pieces to save you time.
Receive automatically generated summaries for your favorite content.
Chat. Learn. Remember.
Knowledge that sticks.
Chat with your 2nd (and 3rd) brain for instant answers and insights.
Great Knowledge, Small Price
Advanced discovery, personalized quizzes, and full control of your knowledge base.
Basic
FREE FOREVER
No Credit Card Required
$0
/month
AI Summaries
Daily Quizzes
Shared Collections
Unlimited AI Conversations
3 Collections
10 Link Summaries (i.e. blogs or YouTube videos)
5 Screenshot Summaries
5 File Summaries
5 Audio Summaries
10 On-Demand Quizzes
Audio Narration for Every Summary
Pro
3 Day Trial
The GOAT of AI knowledge plans
$14.99
/month
AI Summaries
Up to 3 Daily Quizzes
Unlimited Collections
AI Content Discovery
Automatic Screenshot Discovery
Channel Subscriptions
Advanced Statistics
Unlimited AI Conversations
Unlimited Collections
100 Link Summaries (i.e. blogs or YouTube videos)
50 Screenshot Summaries
50 File Summaries
50 Audio Summaries
Unlimited On-Demand Quizzes
Audio Narration for Every Summary
Ultra
Perfect for knowledge junkies
$29.99
/month
AI Summaries
Up to 3 Daily Quizzes
Unlimited Collections
AI Content Discovery
Automatic Screenshot Discovery
Channel Subscriptions
Advanced Statistics
Unlimited AI Conversations
AI Chat Model Selection (ChatGPT 5, Claude Sonnet 4, Gemini 2.5 Pro)
Unlimited Collections
300 Link Summaries (i.e. blogs or YouTube videos)
100 Screenshot Summaries
100 File Summaries
100 Audio Summaries
Unlimited On-Demand Quizzes
Audio Narration for Every Summary
Wanna get the Brain of a GOAT?
Download the one app to help you capture, remember, and grow with every tap.
FAQ
Frequently Asked Questions
What is 23Brain?
23Brain is an AI-powered learning app that helps you retain knowledge from videos, articles, and files. It creates smart summaries, quizzes, and insights.
Which links does 23Brain support?
23Brain supports most public links from platforms like YouTube, Medium, and Substack. Paywalled content isn’t supported. Some sources such as Spotify, Apple Music, and Amazon Music are also not supported.
Is 23Brain free to use?
You can start free with limited features. A paid plan unlocks advanced analytics, custom quizzes, and unlimited uploads.
Can I use 23Brain offline?
Yes, saved summaries and quizzes are available offline. AI generation requires internet.
What kind of content can I upload?
You can upload videos, PDFs, Word files, and images. 23Brain extracts content and creates summaries and quizzes.
Is my data safe with 23Brain?
Yes. Your data is securely stored and never shared without consent. You can delete your account and data at any time.
Can I access my learning stats?
Absolutely. 23Brain provides insights into progress, quiz performance, and consistency over time.
Do you offer a mobile app?
Yes, on Android and iOS — with progress syncing across devices.
How do I contact support?
Reach us at support@23brain.app or via in-app support chat.
