# DoCube: PDF Reader & Notes — EPUB, Markdown & Translate

> E-book reader and knowledge management tool for reading, annotating, and memorizing content. (iPhone/iPad app by 巍 赵.)

- Source: https://appshunter.io/ios/app/docube-pdf-reader-and-notes/id6470183496 (this page in markdown: same URL + `.md`)
- Developer: [巍 赵](https://appshunter.io/developer/1686869575)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 4.60/5 from 11 App Store ratings · 10 written reviews indexed
- Age rating: 17+
- Requires: iOS 17.0 · 91 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Russian, Chinese (Simplified, China), Thai, Chinese (Traditional, Hong Kong SAR China) and 1 more
- Released: 2025-07-14
- Data updated: 2026-08-23
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/docube-pdf-reader-and-notes/id6470183496/reviews.md

## What is DoCube?

DoCube is a multi-format reader and personal knowledge base built for deep reading.

Bring PDFs, EPUBs, local videos, web snapshots, Markdown, and organized scanned documents into one library. Annotate, link, search, translate, export, and review while you read or watch. Your materials are not merely stored—they gradually become knowledge you can retrieve, connect, and remember.

【Deep Reading Across Formats】
DoCube supports PDFs, EPUBs, local videos, offline webpages, Markdown, and parsed documents. Whether you work with research papers, ebooks, web articles, course videos, lectures, interviews, or your own Markdown notes, you can read, watch, and manage them together in DoCube.

【Deep Study for Video】
Import local videos and study courses, lectures, and interviews as deeply as documents. DoCube can read embedded subtitles and, on supported devices, generate subtitles for videos that do not have them. Search subtitles; switch between original, translated, and bilingual views; annotate subtitles; use chapter outlines, playback speeds, and A/B looping. Open a search result, annotation, or chapter to return to the exact moment, turning video into knowledge you can retrieve, connect, and review.

【Multi-Tab Reading】
Open multiple documents and videos in tabs, just like a browser, and switch quickly between materials. Read a paper, compare references, watch a course, or return to where you left off without losing context.

【Annotations and Notes in Context】
Use highlights, underlines, strikethroughs, quotations, links, and Markdown notes directly on source text or at a precise location in video subtitles. Your thinking stays connected to its context.

【Link Materials Together】
DoCube can link an annotation in a document or video to a precise location in another resource. Connect scattered chapters, paragraphs, webpages, video clips, and notes into your own paths through knowledge.

【Search What You Have Read and Watched】
Search not only titles and body text, but also video subtitles, highlights, quotations, links, notes, and cards. Anything you have read, watched, marked, or written can help you find the right material again.

【Keep Reading in Other Languages】
Translate selected text while reading. Some document types support full-document translation and translated exports, while videos support subtitle translation and original, translated, or bilingual display. Read foreign papers, webpages, ebooks, and course videos without constantly switching tools.

【From Annotation to Review】
Turn important content from documents and videos into review cards. Flip cards, mask cards, and review plans bring what you have read and watched back at the right time, instead of letting it disappear after you finish.

【Export and Sync】
Export document content and translations to common formats, including bilingual versions. DoCube is available on iPhone, iPad, and Mac, with iCloud sync and local Wi-Fi transfer.

Ideal for:
- People who read research papers and professional materials
- Learners organizing PDFs, EPUBs, webpages, Markdown, and videos
- People who study long-term with course, lecture, and interview videos
- Deep readers who want annotations, notes, and review in one loop
- Anyone building a personal knowledge base instead of merely collecting files

The free version manages up to 5 documents and lets you experience the core reading and knowledge-management workflow. Upgrade to Pro to remove the document limit and build an unrestricted personal library.

## Key features

- Multi-tab reading for multiple documents
- Precise document positioning and history navigation
- Support for PDF, EPUB, Markdown, and web pages
- Six annotation tools including highlights and notes
- Cross-document linking for knowledge networks
- Automatic flashcard creation from highlights
- AI-enhanced card generation

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full-platform Professional Edition | $34.99 | one-time |


## Recent user reviews (10 of 10)

All indexed reviews: https://appshunter.io/ios/app/docube-pdf-reader-and-notes/id6470183496/reviews.md

### 5/5 — Game-changer for academic research!

*2026-02-21*

As a teacher, I juggle hundreds of PDFs. DoCube's cross-document search is a lifesaver—it finds that one quote across all my papers instantly. The ability to link ideas between documents with annotations is like building a personal, interactive web of knowledge. Essential for anyone in higher education.

### 5/5 — 完美的物品管理神器

*2026-02-03*

以前买的东西都是用Excel表格记录，既麻烦检索也不方便，自从下载了持物彻底改变了我的生活痛点！
不仅能记录购买日期、价格，还能设置保修或者保养提醒，再也不用担心错过保修期或者保养了。
软件操作也很方便流畅，上手无难度，期待后续能出桌面小组件功能，那就更完美了～开发者加油！

### 5/5 — 非常实用！！

*2026-01-25*

Docube太实用了！做知识库超顺手，多格式文档都能看，标注和搜索功能超赞，还能多端同步，效率直接拉满

### 5/5 — 多平台阅读用户的福音！

*2026-01-25*

可以剪藏网页，对微信公众号文章的适配度尤其高，能够统一阅读，同步管理阅读摘要。在阅读本地书籍的同时可以同时收集网络其他相关交流，真的很方便。推荐一下！

### 5/5 — 很好

*2026-01-21*

好强的软件，好用

### 5/5 — 五星力荐！打造个人知识库的终极工具！

*2026-01-21*

用了很多阅读和笔记APP，Docube直接封神！作为经常读PDF、EPUB和网页文章的学生党，它的多格式支持太戳我了，Safari一键保存网页离线读，Markdown还能直接编辑，不用再切换多个软件啦，啦啦啦！真赞👍

### 5/5 — The experience has been fantastic, and I’ve grown quite fond of this software.

*2026-01-21*

It wasn't until I started using DoCube that I unlocked a whole new way to read: just like a browser, it lets me open multiple tabs to read several books at once without any hassle. To me, it's long since been more than just a tool—it feels like a personal knowledge base that organizes all my scattered information in one place.

### 5/5 — 超神的app

*2026-01-21*

感谢开发者！

### 5/5 — The document link is awesome

*2025-10-29*

I can now directly jump to the referenced PDF locations from my Obsidian notes. Although DoCube has built-in Markdown support, migrating from Obsidian is too slow—I can only keep copying and pasting. I’m looking forward to batch import or other migration solutions being introduced.

### 5/5 — Really cool

*2025-10-08*

All my document contents can also be searched on my iPhone

## Frequently asked questions about DoCube

### What file formats does DoCube support?

DoCube supports a wide range of formats including PDF, EPUB, Markdown, and offline webpages. This allows users to consolidate their reading and note-taking across various document types within a single application.

### How does DoCube help with memorization?

DoCube converts highlights into interactive flashcards (flip cards or mask cards) that are directly linked to their source location in the document. This feature aids in active recall and memorization of key information.

### Can I link information between different documents in DoCube?

Yes, DoCube allows for cross-document linking. Annotations can be linked to specific locations in other documents, helping users build a connected knowledge graph and see relationships between scattered information.

### Does DoCube offer any AI features?

Yes, DoCube includes AI-enhanced creation capabilities. Users can use custom prompts to have AI generate flashcards based on the document's context, simplifying the breakdown of complex concepts into memorable points.

### How does DoCube handle navigation within documents?

DoCube provides precise positioning, giving each location in a document a unique address for one-tap access. It also features independent back/forward navigation for each tab, making it easy to retrace complex document paths.

### What are the annotation tools available in DoCube?

DoCube offers six versatile annotation tools, including highlighting, underlining, strikethrough, creating links, Markdown notes, and citations. These tools can be visually managed with a configurable color system.

### Is DoCube available on multiple devices?

DoCube is supported on Mac, iPhone, and iPad, allowing users to access and manage their reading and notes across different Apple devices.

### How often is DoCube updated?

The latest version of DoCube is 1.5.3, and it was last updated on March 17, 2026. This indicates a commitment to ongoing development and improvements.

## Version history (last 5 releases)

### 1.7.2 — 2026-08-05

Added a comprehensive Help Center, making common features and entry points easier to find.
Optimized memory use and restoration when reading multiple documents.
Improved paragraph retranslation, comments on PDF annotations, and MinerU search stability.

### 1.7.1 — 2026-07-15

Improved EPUB full-document translation compatibility, fixing an issue that prevented some EPUBs with very long paragraphs from completing translation.

Added targeted retranslation: retranslate individual paragraphs in EPUB, MinerU, and HTML documents, or individual video subtitle entries.

Added full-document translation for HTML, with translated tables of contents and bilingual or translation-only export.

### 1.7.0 — 2026-07-11

Added Video Documents
Added Folder and Import Enhancements
Improved Reading Experience and Stability

### 1.6.0 — 2026-05-22

1. More reliable export: Markdown, HTML, EPUB, and MinerU documents can now be exported more smoothly as PDF, EPUB, or original files.
2. Added Markdown folder scan import, so you can import Markdown content from a folder at once.
3. Improved Flip Cards and Mask Cards, making them easier to create, edit, and review.

### 1.5.4 — 2026-04-22

Version 1.5.4 brings a more complete EPUB translation and bilingual reading experience, along with new bookmark support for PDF and EPUB so you can return to important parts of long documents more easily. We also improved translation progress visibility, notifications, and task stability to make the translation workflow smoother.

This update also adds support for local embedding models to strengthen on-device semantic retrieval and intelligent processing. At the same time, we improved search, import, and large-document performance, with better stability in low-memory situations. We also refined reading UI, toolbar interactions, and annotation menus across iPhone, iPad, and macOS, while improving settings for OpenAI, OpenRouter, and local models.

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## More apps by 巍 赵

- [DocWeave: PDF Document Scanner](https://appshunter.io/ios/app/docweave-pdf-document-scanner/id6771049566)

All apps by 巍 赵: https://appshunter.io/developer/1686869575

## Related topics

[cube reader](https://appshunter.io/ios/topics/cube-reader)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*