# BrainDen product overview

- Official website: https://brainden.app
- Last reviewed: 2026-07-19
- Category: Educational application and AI study companion
- Platforms: Web, iPhone, iPad, and Android
- Languages: 32 supported languages
- Access: Free to start; no payment card is required for the first notes

## What BrainDen does

BrainDen turns a learner's own material into a connected study system. Sources can include live lecture recordings, uploaded audio, PDFs, YouTube videos, photos, and text. BrainDen creates a structured, editable note while preserving access to the source where the source type supports it.

## Study workflow

1. Add learning material by recording a lecture or importing a PDF, video, audio file, photo, or text.
2. Review and edit the structured note. Return to the attached source to verify important details.
3. Highlight and comment on source material where supported.
4. Study with flashcards, quizzes, mind maps, translation, or Explain It Back active-recall practice.
5. Organize notes in nested folders, connect related notes with links and backlinks, or read several notes together.
6. Share a note or complete folder as a read-only web link and control whether source or transcript content is visible.

## Important product boundaries

- Generated notes are working study material, not a substitute for checking technical details against the original source.
- Users should only upload or record material they are permitted to process and should follow the rules of their institution and jurisdiction.
- Public sharing is controlled by the owner and can be disabled. Recipients can read public links on the web without a BrainDen account.

## Independent review

BrainDen was independently reviewed by Educational App Store for educational quality, safety, usability, and relevance. It received Educational App Store Certified 2026 status and a 5.0/5 rating.

- Review: https://www.educationalappstore.com/app/brainden

## Use BrainDen

- [Web app](https://learn.brainden.app)
- [iPhone and iPad](https://apps.apple.com/us/app/brainden-ai-study-companion/id6757434859)
- [Android](https://play.google.com/store/apps/details?id=com.brainden.app)