DoCube - Your Knowledge base
1-Stop: Learn, Notes, Research
Free · In-App Purchases
DoCube – Smart Document Browser & Personal Knowledge Management Tool
Explore, Annotate, Connect – Redefine your reading and knowledge management with DoCube. In an era of information overload, efficient reading, deep annotation, and lasting retention are essential. DoCube helps you build a personal knowledge base, ensuring every piece of reading leaves a trace, every annotation transforms into lasting memory, and every text can be quickly retrieved.
Browser-like Reading Experience
Instant search across your entire document library, with results ranked by relevance.
Unique deep links for every document location—navigate seamlessly between documents.
Tab-based browsing with full history support (back/forward navigation).
Multi-Format Document Support
Import PDFs & EPUBs from local storage.
Save web pages from Safari for offline reading.
Create and edit Markdown documents.
Tagging system — organize documents with unlimited custom tags for smart filtering.
Unified Annotation System
Six annotation types: highlight, underline, strikethrough, link, Markdown notes, and quote.
Text-bound annotations — search results prioritize annotated content.
Works across PDFs, EPUBs, and web pages — consistent experience.
Six customizable colors for visual categorization.
Auto-convert annotations into flashcards based on color&type.
Deep linking — connect annotations across documents.
Built-in Flashcard Templates
Flip cards (Q&A format) & Mask cards (hide/reveal key content).
Full Markdown support — formulas, images, videos, and more.
Context-aware — cards remain tied to their source text.
Reading & Review Planner
Weekly planning—set daily goals (weekends optional).
Progress tracking — documents split into sections for granular insights.
Daily completion stats — stay motivated.
AI-Powered Enhancements
Smarter search — AI summarizes results and pinpoints key excerpts.
AI-generated flashcards — custom prompts refine card creation.
Semantic Search — you can easily find the content you need, Even if you can't remember the exact original text
Cross-Device Sync
One purchase, three platforms — iPhone, iPad, and Mac
iCloud sync — have full control over your document data
Conflict-free merging — offline edits sync seamlessly.
Home Screen Widgets
Quote widget — random flashcards for serendipitous review.
Daily planner widget — track progress at a glance.
The free version supports all functions, with a limit only on the number of documents that can be imported or created. The free version allows a maximum of 10 documents. You can unlock the limit on the number of documents by purchasing the professional version within the app.
Ratings & Reviews
This app has not received enough ratings or reviews to display an overview.
- Underline text to add notes
- Organize documents by project
- Organize documents by folder/category
- Fixed inaccurate EPUB table of contents navigation
- Added progress indicator for iCloud sync
The developer, 巍 赵, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- 巍 赵
- Size
- 40.3 MB
- Category
- Books
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English and Simplified Chinese
- Age Rating
16+
- 16+
- Contains
Unrestricted Web Access
- In-App Purchases
Yes
- Pro Edition ₦ 14,900.00
- Copyright
- © 2025 Wei Zhao