DoCube - Reader & Notes
For PDF,EPUB,Markdown and Web
Free · In-App Purchases
DoCube - eBook Reading & Knowledge Management Platform
More than reading—it's learning. DoCube redefines how you read and manage knowledge, helping you build a personal knowledge base where every reading leaves a trace, every annotation becomes lasting memory, and every piece of text is instantly retrievable. Shift from simply "seeing" to truly "learning," from passive reception to active construction—make every minute of reading create lasting value.
【Browsing-Like Reading Experience】
Open multiple documents in tabs for easy context switching.
Every location in a document has a unique address—navigate to other documents via link annotations.
Each tab supports browsing history, allowing forward/backward navigation.
【Support for Multiple Document Formats】
Import PDF, EPUB, or MinerU archive files from local storage.
Import and save web pages from Safari for offline reading.
Create and edit Markdown documents.
【Powerful Search Capabilities】
In-Document Search – Pinpoint exact content within a file.
Cross-Document Full-Text Search – Efficiently search across all your documents.
Semantic Search – Understands what you mean, not just what you type.
【Unified Annotation System】
Six annotation types: Highlight, Underline, Strikethrough, Link, Markdown Note, and Quote.
Supports multiple formats: PDF, EPUB, Web, and MinerU archives.
Six customizable theme colors for annotations.
Automatically turn annotations into study cards for easy review of key points.
Link annotations can point to any location in another document, building your knowledge network.
【Built-in Flashcard Templates】
Two card types: Flip Card and Cloze (Mask) Card.
Cards are formatted in Markdown with full syntax support.
Cards are annotations—each is tied to specific text in the original document.
【Reading & Review Planning】
Set daily goals in a weekly cycle.
Plan reviews by tags, documents, or custom categories.
Split documents into articles to track reading progress—see gaps at a glance.
【AI Assistant】
Enhanced Search – AI summarizes search results, highlighting key information and source locations.
Smart Flashcards – Use custom prompts to let AI generate flashcards with document context.
Semantic Search – Find what you need even if you only remember the general idea.
【Multi-Device Sync】
One purchase works on iPhone, iPad, and Mac.
Sync via iCloud.
Local Sync – Transfer directly between devices on the same Wi-Fi for added security.
All data supports offline edits and automatic conflict-free merging across devices.
【Home Screen Widgets】
Quote Widget – Displays random quote annotations for daily reflection.
Daily Plan Widget – Shows today’s reading/review tasks and completion progress.
The free version includes all features, with a limit of up to 10 imported or created documents. Upgrade to Pro via in-app purchase to unlock unlimited documents.
Ready to build your smart knowledge system? Download DoCube today.
Ratings & Reviews
This app has not received enough ratings or reviews to display an overview.
- Added a new document type: MinerU Archive
- Added LAN sync functionality
- Fix UI errors in iOS 26 system
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
- 44.6 MB
- Category
- Productivity
- 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 10 more
- English, French, German, Italian, Japanese, Korean, Russian, Simplified Chinese, Thai, Traditional Chinese, Turkish
- Age Rating
16+
- 16+
- Contains
Unrestricted Web Access
- In-App Purchases
Yes
- Pro Edition ₹ 1,299
- Copyright
- © 2025 Wei Zhao