# 23Brain

> 23Brain (iPhone/iPad app by Felix Seip.)

- Source: https://appshunter.io/ios/app/23brain/id6748966833 (this page in markdown: same URL + `.md`)
- Developer: [Felix Seip](https://appshunter.io/developer/1819359578)
- Category: Productivity, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 76 MB
- Languages: American English
- Released: 2025-11-01
- Data updated: 2026-03-11
- User reviews in markdown: https://appshunter.io/ios/app/23brain/id6748966833/reviews.md

## What is 23Brain?

Your second and third brain for smarter learning
23Brain helps you collect, summarize, and retain knowledge from everything you read, watch, or listen to — powered by AI. Build a personal learning system that grows with you.

How it works
• Summarize any content automatically
   Save links, videos, or PDFs — 23Brain generates concise, AI-powered summaries.

• Learn on the go
   Listen to audio summaries anywhere and make use of your time more efficiently.

• Organize with collaborative collections
   Group related topics, share insights, or explore curated watchlists.

• Retain knowledge with AI-generated quizzes
   Reinforce what you’ve learned through personalized quizzes that adapt to your interests.

• Chat with your second brain
   Ask questions, connect ideas, and reflect on what you’ve learned through intelligent conversations.

• Track your progress
   Stay motivated with streaks, insights, and detailed learning statistics.

Why 23Brain
Unlike traditional note-taking tools, 23Brain helps you remember more and understand faster — not just store information. It’s your personal AI companion for continuous learning and long-term growth.

Key features
• AI summaries for articles, videos, and podcasts
• Audio playback for summaries
• Personalized quizzes and progress insights
• Collaborative collections and watchlists
• Multi-language support for 12 languages including English, German, and Hindi
• Light and Dark Mode

Start building your second brain today.
Turn what you learn into knowledge that lasts.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro (Monthly) | $12.99 | per month |
| Pro (Yearly) | $99.99 | per year |
| Ultra (Yearly) | $249.99 | per year |
| Ultra (Monthly) | $24.99 | per month |



## Version history (last 2 releases)

### 1.0.3 — 2025-11-09

- Add "review 23Brain on app store" dialog
- Bug fixes related to quiz heatmap calendar
- Optimize onboarding flow

### 1.0 — 2025-11-01

No release notes.

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## Related topics

[23brain](https://appshunter.io/ios/topics/23brain)

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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 2026-03-11.*