Your Second Brain
DoCube brings together all your documents, providing a one-stop personal knowledge base for reading, note-taking, review, and search
Gather Your Personal Documents
Support multiple document formats, utilize powerful search, document tags, and document links to build an intelligently explorable, deeply interconnected knowledge system
Global Search
Say goodbye to manually searching through multiple documents. Enter any keyword and combine advanced queries, document types, tags, and other filters to precisely control your entire knowledge base
Document Links
Break down document silos, easily create connections between documents through link annotations or Markdown links, building your knowledge network
Annotations, Completely Different
An annotation system designed for deep readers. It not only records your thoughts but transforms them into powerful actions: enhanced search, memory assistance, and inspiration sparking
Focus on Key Content
Annotated text ranks higher in search results and can be manually filtered, making important information clear at a glance
Auto-Generate Memory Cards
All annotated content can automatically transform into memory cards, using spaced repetition algorithms to help you review efficiently and never forget
Encounter Past Inspiration
`Quote` annotations appear as `Daily Tips` on the app homepage or as widgets, proactively awakening your memory and stimulating new thoughts
AI Assistant, Double the Efficiency
No complex configuration needed, just fill in your API key to unlock three smart features. Built-in free AI providers make intelligent reading within reach
Search Summary
One-click summary of search results, organized into Markdown documents with citation sources. Documents can be saved and integrated into your knowledge base, taking you directly to core insights when searching related topics
AI-Generated Memory Cards
Generate memory cards based on reading context and custom prompts, eliminating the need for creative brainstorming and going straight to review. Includes built-in AI vocabulary cards and AI highlight cards
Semantic Search
Break through language and expression limitations. Whether asking in another language or describing from vague impressions, AI understands your intent and delivers target content
Your Data & Privacy
We do not collect or store any information that can identify your personal identity or any privacy-related data generated within the application
We only collect completely anonymous usage data and crash reports, solely for the purpose of improving application performance and user experience
All your personal documents, notes, and related data are stored locally on your device and securely synced through iCloud, ensuring you have complete control
When you use AI features, some text content from local documents will be sent to your configured AI providers to process your requests