# MarginNote 4: AI Notes·MindMap — Read & Flashcards All in One

> Integrated study app for reading, notes, mind maps, and flashcards. (iPhone/iPad app by Beijing Yunsi Software Technology Co., Ltd.)

- Source: https://appshunter.io/ios/app/marginnote-4-ai-notesmindmap/id1531657269 (this page in markdown: same URL + `.md`)
- Developer: [Beijing Yunsi Software Technology Co., Ltd](https://appshunter.io/developer/723205556)
- Category: Productivity, Education
- Price: Free with in-app purchases
- Rating: 4.50/5 from 716 App Store ratings · 560 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 330 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2024-05-12
- Data updated: 2026-08-28
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/marginnote-4-ai-notesmindmap/id1531657269/reviews.md

## What is MarginNote 4?

MarginNote is the PDF study tool for deep readers. One excerpt is a PDF highlight, a mind map node, and a flashcard — one capture, three places. This is the Card Axis architecture, so you stop ferrying content between a PDF reader, a notes app, and a flashcard tool. A decade of iteration. 188K+ App Store ratings.

【Four Featured Mechanics】

▸ Card Axis — One excerpt, three renders. Document highlight, mind map node, and flashcard are the same card seen from three angles.
▸ Title Link — Old notes auto-surface in new documents. When a familiar concept appears in what you're reading, your past annotation lights up on the page.
▸ Extended Note — Long-press anywhere on a PDF to open writing space. No anchored text required; three display modes (inline / margin / collapsed).
▸ Immersive Mode (4.4) — Three-state toggle: Read / Write / Recall. UI folds away. Recall blurs excerpts with Gaussian blur — tap to reveal only after you've actually recalled.

【AI Capabilities (introduced in 4.2)】

AI book breakdown · AI OCR templates · AI translation · AI Q&A · AI flashcard generation
Our stance is AI as assistant, not replacement — every suggestion can be saved as your own thinking node, never thinking for you.

【Apple Intelligence (iOS 26+)】

Recall Mode hints can run on-device via Apple Intelligence — pick "Apple AI" or "cloud LLM" in Settings. With Apple AI selected, three tiers of help — Neighbor Coordinate · Reasoning Prompt · Key Distinction — are generated by Apple Foundation Models right on your device: no network calls, no AI credits used, your notes never leave your device. Even if you've selected cloud LLM, going offline auto-falls back to Apple Intelligence (provided your device supports it) — so libraries, planes, and exam-day silent rooms never break your hint loop.

【Full Workflow】

Fast OCR · Study Sets (PDF / EPUB / video / audio) · direct read from Zotero / cloud drives / USB · 10 mind map styles · book recomposition · dual-document compare · concept maps · handwriting layers

【FSRS Spaced Repetition】

Built on the open-spaced-repetition project's algorithm (paper accepted by ACM SIGKDD; Anki has used FSRS as its default scheduler since v23.10). Push short-term memory into long-term.

【Built For】

Anyone re-reading a single document until it sticks — med school (USMLE / MCAT) · law school (LSAT / bar exam) · grad prep (GRE / GMAT / CFA) · researchers · language learners (IELTS / TOEFL) · serious readers.

【All Apple Platforms】

iPhone + iPad + Mac under one Apple ID. iCloud syncs Study Sets, notes, and review progress. Native Apple Pencil support on iPad.

—

Questions? Email service@marginnote.com
Terms: https://dist.marginnote.com/MarginNote_Terms_and_Conditions.pdf
Privacy: https://dist.marginnote.com/MarginNote_Privacy_Policy.pdf

## Key features

- Integrated reading, note-taking, mind mapping, and flashcards
- Quick Extend Note and Handwriting Layers for annotation
- Study Set for organizing PDFs, EPUBs, videos, and audio
- Mind Map and Concept Diagram for visual learning
- AI Content Detection for formula and chart extraction
- FSRS spaced-repetition algorithm for reviews
- iCloud sync across Apple devices

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Subscription to MAX (Annually) | $12.99 | per year |
| MarginNote Max Annual | $16.99 | per year |
| Subscription to MAX (Monthly) | $1.99 | per month |
| Subscription to MAX (6 months) | $7.99 | per 6 months |
| Subscription to MAX (3 months) | $4.99 | per 3 months |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock MAX Forever (New) | $51.99 | one-time |
| Unlock MAX based on PRO (New) | $40.00 | one-time |
| Unlock MAX based on PRO | $39.99 | one-time |
| Upgrade to MAX from MN3(macOS) | $19.99 | one-time |
| Upgrade to PRO from MN3(iOS) | $4.99 | one-time |
| 14 days Free Trial | Free | one-time |
| 14 days Free Trial | Free | one-time |
| Unlock PRO Forever (New) | $12.99 | one-time |


## What do users think of MarginNote 4?

Overall sentiment: neutral

**Pros**

- 🚀 Powerful features
- 📚 Great for academic/research use
- 👍 Useful note-taking and organization
- 🖊️ Improved handwriting and annotation

**Cons**

- 🐛 Buggy and crashes frequently
- 🕰️ Slow and laggy sync between devices
- 🤯 Steep learning curve, poor documentation
- 💰 Expensive upgrade from previous version

**Commonly reported bugs**

- Disappearing annotations when using extend function
- Inability to restore accidentally deleted mind maps
- Inconsistent behavior with PDF file management

**Most requested features**

- Improved iCloud/cloud sync reliability
- More intuitive and user-friendly interface
- Better support for external document libraries
- Ability to disable auto-excerpt selection

## Recent user reviews (10 of 560)

All indexed reviews: https://appshunter.io/ios/app/marginnote-4-ai-notesmindmap/id1531657269/reviews.md

### 5/5 — 更新的字号问题

*2026-08-18*

因为我文本一直用八号字体输入，更新之后之前的八号字体大小相对文档本身的来说外观没有变化，但是点进文本框可以发现字号都变成了3-5号，此时我再次输入最低只能选到8号字体，相对于文档来说就变得很大了，能否修复一下这个问题呢，或者有无可能增设更小的字体样式呢

### 3/5 — 闪退和bug

*2026-08-15*

今天我弄思维导图，结果这个软件它不仅闪退，而且我的思维导图里面的摘出来的重点突然就全部不见了，突然就消失了，而且点击思维导图他不会和同步了顶多就是跳到首页，我不知道为什么会这样，能不能赶紧打个这个补丁优化一下呢？毕竟这样体验感真的差，差爆了

**Developer response:** 您可以在首页-更多-版本库里恢复历史版本看看，如果还有更多问题请在App内反馈与客服中联系我们

### 4/5 — Necesito español

*2026-08-14, version 4.4.5*

Le daré 5 estrellas cuando pongan español en el idioma de la aplicación

### 5/5 — 强烈建议MN4接入notebooklm 功能

*2026-08-14*

作为一名文科留子，需要阅读并整理大量英文文献，目前的MN只能提供整理和归纳这一步，其中的研究功能并不完全（很多只提供网页搜索和简单的翻译），不能满足文献研究的需求。NotebookLM可以提供文献精读服务，识别专业词汇和厘清文章思路，更为专业。但目前二者需要分开使用，经常要切换页面。MN能否出一个接入AI的功能，实现随问随答随生成笔记和复习卡片？

**Developer response:** 您好，您的需要现在完全能实现，您可以打开AI对话框，调用相关工具写好提示词处理，同时现在MN也支持自定义API，您可以接入自己使用的AI模型的API使用。

### 5/5 — Still awesome since 5 years

*2026-08-13*

With major latex features pointing towards rendering. I feel marginnote should also make a “pdf reflow” mode for iPhones

### 2/5 — 单纯的想骂你们

*2026-08-10, version 4.4.5*

压平导出这么简单实用的功能不能用了？

### 5/5 — 非全屏开启浮动右侧面板时AI对话框无法调大小

*2026-08-01*

希望能给那个AI对话框左下角和右下角设置那种可拖拉变形的功能，对话框有点过于窄长了，想让他变宽变短些，希望添加手动调节功能，并在每次关闭重开对话框后，能保持上次调节的位置与形态

**Developer response:** 亮度应该通过系统控制吧

### 5/5 — 잘 쓰고 있습니다

*2026-08-01*

마진노트 애용하고 있습니다. 잘 쓰다가 한번씩, 마인드맵 넘어갈 때나 트리 다른 걸로 바꾸거나 할 때 터치가 안 먹힙니다. 먹통이라서 다른 걸로 선택이 안 되고, 마인드맵 바탕을 선택하면 또 터치가 되어서 해당 마인드맵 목록이나 트리 목록이 꺼지긴 하는데, 해당 아이콘을 열고 나온 버튼 터치들 안 먹히는 거 개선 부탁드립니다. 그럴때마다 아이패드 껐다가 켰다가 하고 있어요.

### 5/5 — 这个软件太好用啦！

*2026-07-11*

集齐各大笔记软件的优势于一体，强大的脑图直呼这是什么二十一世纪新发明，看文献做笔记的好搭子，不是托不是托

### 5/5 — 比较实用的笔记软件

*2026-07-09*

用过苹果和win端的很多笔记软件，这是目前用过的比较好用的笔记软件，像ocr、脑图、摘录、折页、留白之类的功能，对科研人尤其文科生来说都很实用，构建知识库，买断会员还是挺值的。唯一的缺点是mac端不如pad端好用，页面、脑图的拖拽的操作过于繁琐，另外就是学术翻译如果可以接翻译引擎的话会更准确一些，自带的百度翻译和谷歌翻译精度有些不尽如人意。总的来说还是非常好用。

## Frequently asked questions about MarginNote 4

### What does MarginNote 4 do?

MarginNote 4 is a comprehensive study application that combines reading, note-taking, mind mapping, and spaced-repetition flashcards into a single workspace. It aims to help users preview, consolidate, practice, review, and remember information using proven study methods.

### What are the key features of MarginNote 4?

Key features include Quick Extend Note for adding extra writing space, Handwriting Layers for managing ink, Study Sets for organizing various media types, Mind Maps and Concept Diagrams for visual learning, AI Content Detection for extracting academic data, and the FSRS algorithm for spaced repetition reviews. It also offers iCloud sync across Apple devices.

### How much does MarginNote 4 cost?

MarginNote 4 offers a free 'Basic' tier with limited features. 'Pro' and 'Max' tiers are available as one-time purchases or upgrades, unlocking advanced features like on-device OCR, AI extraction, and multi-window support across all Apple devices. All plans include a 14-day free trial.

### What devices is MarginNote 4 compatible with?

MarginNote 4 is compatible with iPhone, iPad, and Mac devices. It supports iCloud sync across these platforms, allowing users to access their study materials and notes seamlessly.

### What are common use cases for MarginNote 4?

Common use cases include annotating PDFs and EPUBs, creating mind maps to visualize connections between ideas, generating flashcards for memorization, organizing research materials from various sources like Zotero, and preparing for exams through active recall and spaced repetition.

## Version history (last 5 releases)

### 4.4.6 — 2026-08-23

This update adds an in-app Message Center and continues to improve AI Extract Questions, study set document management, Markdown text boxes, handwriting, version history export, and overall stability.

AI Extract Questions
- After AI Extract Questions is complete, use “AI Read-Through & Re-Breakdown” on chapters with unsatisfactory splitting. AI re-evaluates question or content-unit boundaries and rebuilds the cards from the original text.
- Improved recognition of specially formatted documents, reducing separated choices, merged questions, and missed questions.

Message Center
- Added an in-app Message Center for official messages and product updates.

Study Set Management & Backup
- Added “Organize by Source Path” for study set documents, with collapsible hierarchies for local files, iCloud Drive, and external folders.
- Missing source documents can now be re-linked.
- Added duplicate card detection and repair for study sets. A protective backup is created before repairs are applied.
- Study set backups can be exported without version history, with the five most recent versions, or with all versions.

MarginNote Agent AI Breakdown (Lab)
- MarginNote Agent organizes long documents chapter by chapter into structured mind maps. It supports General Breakdown, Original Book Structure, Key-Point Q&A, and Terminology Dictionary tasks.
- Review and refine results chapter by chapter, and view or restore previous chapter versions.
- Supports automatically applying card color styles.
- MarginNote Agent uses MarginNote’s built-in AI service. Running tasks consumes MarginNote credits.
- To use this feature, enable MarginNote Agent in Settings > Lab.

Other Improvements & Fixes
- Fixed Markdown text boxes failing to render, overflowing, disappearing, or displaying incomplete content.
- Fixed font, color, and other formatting being lost after moving text boxes across pages.
- Reduced memory usage when loading Markdown caches and large study sets.
- The card editor now supports pasting copied handwriting strokes.
- Improved handwriting rendering performance when zooming and scrolling large mind maps.
- Fixed handwriting being incorrectly disabled after leaving Immersive Mode.
- Fixed a potential crash after exiting handwriting mode.
- Fixed automation settings for different excerpt tools overwriting one another.
- Fixed compatibility issues affecting some mind map branch styles.
- Fixed existing layouts and styles being reset when inserting a table of contents or grouped content.
- Fixed incorrect PDF export ranges for collapsed pages.
- Fixed crashes caused by invalid crop dimensions on certain malformed PDF pages.
- Fixed an iPad issue where incorrect settings pop-up heights clipped the bottom input fields.

### 4.4.5 — 2026-07-24

This update introduces a visual formula editor and Custom AI provider presets, continues refining AI Extract Questions, and focuses on improving the stability of plugins and Markdown editing.

Formula & Markdown Editing
- New MathLive visual formula editor, accessible via the ƒx button in the Markdown editing toolbar. It supports inserting inline and block formulas.
- Formula editing can now be used in Markdown text boxes, document extend notes, mind map cards, and other scenarios.
- Text boxes can now be switched between plain text and Markdown modes, and the last input mode is automatically saved.

AI Extract Questions
- Improved answer pairing for centralized answer key areas and pure-screenshot question cards, reducing issues such as missing answer cards or failed links. Question number relationships are now saved with the cards, supporting re-splitting and cross-session recovery.
- Optimized full-book AI Breakdown for virtual documents and multi-document notebooks. Appended PDFs can also be included in the breakdown process, and the issue of skipping subsequent documents when no table of contents exists has been fixed.
- Fixed an issue where a few pages of a newly created virtual document were incorrectly expanded into numerous processing segments. Pages clearly unsuitable for question recognition in appended documents are now skipped, reducing invalid AI requests and long wait times.
- "Generate Title & Summary" has been adjusted to "Generate Title", allowing AI to generate concise key-point titles while preserving original question numbers as much as possible. 
- Question cards and answer cards no longer duplicate low-quality OCR text, reducing content duplication, blurriness, and noise with screenshots.
- Streamlined the AI Breakdown settings panel.

Custom AI
- New Custom AI provider presets: selecting a preset automatically fills in the Base URL and recommended Mini/Normal models while preserving any previously entered API Key.
- Enhanced compatibility testing for Custom AI.

Other Optimizations & Fixes
- Fixed issues such as consecutive crashes, loading failures, abnormal toolbar buttons, failed pause or resume, and some plugin features becoming unavailable caused by runtime changes to plugins.
- Optimized handwriting rendering for large mind maps, now only processing strokes that intersect the currently visible area, reducing unnecessary computation and improving performance during zooming and scrolling.
- Fixed a display issue with the floating AI chat window in full-screen document mode.
- Fixed a state cleanup issue after canceling an AI conversation.

### 4.4.4 — 2026-07-16

This update focuses on enhancing AI Extract Questions and AI Breakdown, Custom AI, document and mind map export & print, Markdown text box, and plugin management. It also fixes various stability issues.

AI Extract Questions
- Improved recognition accuracy for questions, answers, explanations, order, cross-page questions, and multi-column layouts. Optimized question-answer matching and hierarchy restoration.
- Support for more question number formats, chapter titles, bracket labels, and textbook layout styles.
- Enhanced recognition of English question types.
- Enhanced recognition of "exercise books with extend note". Even if an exercise book contains multiple blank spaces, questions can now be accurately recognized and excerpted, adapting to the blank space practice scenario.
- Updated the AI Breakdown interface, optimizing the breakdown workspace, task progress, and interruption recovery entry for a clearer workflow.

Custom AI (Max Feature)
- New Custom AI support (Max feature). You can configure your own AI provider, model, and API Key in Settings.
- Once Custom AI is configured, all AI features will use your custom AI by default without consuming MarginNote AI credits.

Export & Print
- Document export now includes page selection. You can select specific pages via thumbnails, table of contents, page range, or annotations.
- Mind map export now supports two formats: "Mind Map" and "Card Outline". Mind map branches can also be individually exported as a mind map.
- When exporting a mind map, you can now print level by level and adjust the density.

Markdown Text Box
- New Markdown text box, allowing you to insert and edit Markdown directly in a document.
- Markdown text box supports adjustable width and font size.
- Markdown text box supports URL links.
- You can find Markdown text boxes through document keyword search and on annotation pages.

Other Improvements
- Added an image cropping feature.
- Added a document positioning button in the title link pop-up window. It can automatically open split view and navigate to the original text location of the concept card.
- Support for auto-repairing missing excerpt images.
- One-click pause and resume plugins in the plugin toolbar to reduce the impact of plugins on app stability.
- Optimized plugin resource cleanup, start/stop state synchronization, abnormal configuration protection, and runtime diagnostics.
- Optimized the display of the collapsed mind map count in recall mode.
- Optimized the operating experience and scrolling performance of the extend note expand/collapse button.
- Optimized OCR image processing protection to avoid crashes caused by abnormal or oversized images.
- Optimized handwriting and excerpt shortcuts in Immersive mode, adding shortcuts for various excerpt and annotation tools.
- Optimized the document menu in Immersive mode; temporarily opened documents are now displayed in a separate group.
- Fixed the issue where excerpt tool colors were displayed incorrectly in Immersive mode.

### 4.4.3 — 2026-06-18

This update focuses on improvements to AI Breakdown (Extract Questions), Condense, the Immersive mode reading experience, and backup security.

AI Extract Questions Upgrade
- AI Breakdown now includes a standalone Extract Questions entry, allowing you to quickly extract and split exercises and exam papers.
- Extract Questions will try to create cards as complete questions, grouping question stems, sub-questions, options, materials, and answer explanations together, reducing missed questions, duplicate cards, and incorrect extraction.
- Improved recognition of Chinese/English question numbers, chapter question numbers, consecutive number items, and exam sub-questions. 
Enhanced cross-page question handling, text recognition effectiveness, and stability.
- A quick entry for Extract Questions has been added to Immersive mode, supporting selection of the entire document or by table of contents range for question extraction.

Version Library & Space Management
- Added a space management entry in Version Library that can scan for and release safely recoverable space, displaying the actual freed amount after release.
- Before restoring a version history, the backup data integrity is now checked. If the cloud sync is incomplete, the restore will be stopped to avoid accidentally deleting current content.
- When exiting a study set with unsaved changes, an automatic version history is now generated more quickly.

Immersive Reading Experience
- Added a document side navigation bar in Immersive mode. You can drag it to quickly jump pages, with the page number displayed while dragging. The bar auto-fades when reading.

Condense & Selection Optimizations
- Condense results have been upgraded to three levels: One Sentence, Key Points List, and Detailed Summary, meeting different scenario needs. You can directly switch levels, and press to copy the condensed result.
- In recall mode, condensed results now support progressive hints to help recall collapsed condensed content.
- The selection handle for assistive excerpt now includes a Continuous / Single selection switch. Continuous selection is the default; switching to single selection makes a tap directly select a single block, restoring the assistive excerpt selection behavior from v4.4.1.
- The continuous block selection tool now has a "Clear & Reselect" button, letting you reselect without exiting the mode.

Other Optimizations & Fixes
- Added a "Tap page edge to turn page (Legacy)" toggle in Settings; it is off by default to reduce accidental page turns.
- The minimize button hit area for AI/Research floating windows has been enlarged for easier tapping.
- Added a "Auto-open title link on hover" toggle in title link settings.
- Fixed an issue where mind map menu shortcuts were not working.
- In Immersive mode, the excerpt tool range hint now appears only once.
- Fixed issues where the text box would accidentally exit editing in Apple Pencil mode and text would become blurry in split view or when zoomed in.
- Fixed premature line breaks after restoring text box styles.
- Fixed an issue where tapping to select a block could accidentally select a large area.
- Fixed difficulty in tapping PDF selection/excerpt adjustment handles with large windows or at high zoom levels.
- Fixed a potential crash when exiting a study set instantly.
- Fixed the issue of the Feedback & Customer Service page being interrupted by background network fluctuation pop-ups.
- Continuous optimization of other experience and stability

### 4.4.2 — 2026-06-08

This update introduces PDF Condense and Block Selection, along with a new External Agent Book Breakdown feature. It also upgrades Immersive Mode and the AI chat panel, while continuing to improve Backup & Sync, text box editing, Markdown rendering, and the in-app feedback experience.

New PDF Condense
• After selecting PDF content, you can condense the original text into a short summary displayed in a collapsed form at the original location, making it easier to recall and review.
• Condense settings support condensation granularity, output language, font, and font size. You can also choose between cloud AI and on-device offline AI. On-device offline AI requires Apple Intelligence support and does not consume MarginNote built-in AI credits.

New PDF Block Selection
• After enabling Assistive Excerpt, you can select one or multiple text blocks and then perform Excerpt or Condense.
• This mode is designed for more precise selection and organization by paragraph or content block, making PDF excerpting and condensing more flexible.

New External Agent Book Breakdown
• Chapter content can be exported as a breakdown task package and saved to iCloud, the app directory, or another location accessible to external agents such as Claude Code, Codex, or OpenClaw.
• After processing, the package can be imported back into MarginNote to generate source-linked mind map cards.
• External Agent Book Breakdown does not consume MarginNote built-in AI credits.

Immersive Mode Improvements
• Document-only view now also supports Immersive Mode.
• The document menu in Immersive Mode now includes Show Document Notebook Bar, Dual-Document Comparison, Table of Contents, Import Document, and Linked Documents, allowing you to browse and jump through the table of contents, import documents, compare documents side by side, and manage linked documents while staying immersed.
• The AI chat window in Immersive Mode has been upgraded to a floating window.
• Floating windows, including AI Chat and Research Browser, now support dragging, resizing, and minimizing to a bubble. They also remember their last position and size to reduce obstruction of reading content.

Text Box Editing Improvements
• Improved text box editing, including cursor positioning, text selection, keyboard avoidance, and content clipping. Also fixed an issue where the background color could be lost when remembering text box styles.
• Newly created text boxes are now constrained within the page by default to avoid overflow.

Customer Support Upgrade
• In-app Feedback & Support now supports directly attaching files such as images, documents, logs, crash files, archives, and videos, with a single attachment limit of 20 MB.
• Users can now like support replies, helping us continuously improve support quality.

Other Improvements and Fixes
• Optimized PDF selection, Markdown formula rendering, and web import experience, reducing menu anomalies, rendering issues, and import freezes.
• Optimized backup and import processes for WebDAV, Google Drive, and other services, improving transfer and login compatibility.
• Optimized the large-file upload process for Baidu Netdisk, reducing memory usage during uploads and improving backup stability for large files.
• Optimized the restore purchase process, improving the accuracy of restoring entitlements such as Max and Pro-to-Max upgrades, and providing clearer prompts when restoration fails.
• Fixed multiple display issues in Immersive Mode, including toolbar residue, invisible top navigation, mind map covering documents, and icon flickering.
• Added multilingual text and fixed some localization issues.
• Reduced the frequency of in-app rating prompts to minimize interruptions during learning.
• Continued improvements to overall experience and stability.

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## More apps by Beijing Yunsi Software Technology Co., Ltd

- [MarginNote 2 Pro](https://appshunter.io/ios/app/marginnote-2-pro/id723205553)
- [MarginNote 2](https://appshunter.io/ios/app/marginnote-2/id769389582)
- [MarginNote 3](https://appshunter.io/ios/app/marginnote-3/id1348317163)

All apps by Beijing Yunsi Software Technology Co., Ltd: https://appshunter.io/developer/723205556

## Related topics

[margin note](https://appshunter.io/ios/topics/margin-note)

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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 2026-08-28.*