DoCube - Reader & Notes

DoCube - Turn Reading into Real Knowledge

An exceptional e-book reader and knowledge management tool that creates a complete loop from reading to retention.

Browser-Like Freedom for Reading

[Multi-Tab Reading]: Open multiple books and documents simultaneously. Compare academic papers side by side, jump between novel chapters, and switch contexts instantly.

[Precise Positioning]: Every location in a document has a unique address. Jump to any chapter with one tap—no more painful page flipping to find content.

[History Navigation]: Each tab has independent back/forward navigation. Even complex documents can be retraced effortlessly.

[All-Format Support]: PDF, EPUB, offline webpages, Markdown, and MinerU archives—read everything in one app.

Six Annotation Tools to Build Your Knowledge Network

[Versatile Marking]: Highlight, underline, strikethrough, links, Markdown notes, and citations—everything from quick marks to deep thinking.

[Color Management System]: Six theme colors, freely configurable. Use different colors for different subjects or projects to manage knowledge visually.

[Cross-Document Links]: Link annotations can jump directly to any location in other documents, connecting scattered knowledge points into a knowledge graph.

[Unified Across Formats]: Annotations for PDFs, EPUBs, webpages, and archives are managed in one place—not scattered across multiple apps.

Annotations Are Notes, Notes Are Cards

[Native Markdown Support]: Annotation notes support full Markdown syntax—write code, formulas, and lists freely.

[One-Tap Card Creation]: Highlights automatically convert to flip cards or mask cards. Mark while reading, review and memorize directly.

[Cards Link to Source]: Every card is anchored to a specific location in the document. One tap returns you to the full context—understanding never disconnects.

[AI-Enhanced Creation]: Custom prompts let AI generate cards based on document context, automatically breaking down complex concepts into memorizable points.

From "Read" to "Remembered": The Complete Loop

[Weekly Planning Cycle]: Set daily reading and review tasks on a weekly basis, with visual habit tracking.

[Multi-Dimensional Planning]: Plan by tags, by document, or by article—intensive paper reading and casual reading each have their own rhythm.

[Article-Level Progress]: Long documents are broken into article units. See at a glance what's unexplored versus already read.

[Desktop Review Widgets]: Quote widgets randomly display golden annotations, and daily plan widgets remind you of today's tasks—review even in fragmented moments.

Who It's For

[Researchers]—Multi-tab literature comparison, cross-document linking to build knowledge networks, one-click citation tracing.

[Students]—Annotations convert to memory cards, weekly plans fight forgetting, review rhythm clear and controllable.

[Knowledge Workers]—Semantic search for quick positioning, AI extracts key information, review core points in spare moments.

[Lifelong Learners]—Unified annotations across all formats, complete Markdown thinking, knowledge graphs that connect notes into systems.

Free vs. Pro

[Free Version]: Full feature support, manage up to 5 documents—perfect for light reading and experiencing the complete functionality.

[Pro Version]: In-app purchase removes document limits—unlimited knowledge base.

One purchase works on iPhone, iPad, and Mac.

iCloud sync + local WiFi transfer, automatic offline merge, your data stays safe and secure.