Nebula - Knowledge Center 4+

Make your notes alive

luo xu

    • 3.5 • 2 Ratings
    • Free
    • Offers In-App Purchases


Nebula is a personal knowledge system, combines note-taking, material management, and task management together.

* Rich text editor
- Paragraphs can be folded.
- You can drag and drop to add link and attachments into the editor
- You can paste your image into the editor
- Text decorations like Bold, underscore, italic, strikethrough, hi-lightly.
- Plenty of attachments: image, video, audio, location, freehand sketch.
- Paragraphs can have subparagraphs, easier to organize the contents.
- Link List, checkbox, quote block, source code block.
- Publish to blog platforms with attachments.
- Export to other file formats, such as Markdown, txt, html, pdf, image.
- Add tags to paragraph.
- Add working status to paragraphs.
- Add priority to paragraph.
- Insert date and time.
- Full-screen mode.
- Works with Task Management and Material Management to make everything easy and efficient.

* Task Agenda
- Automatically generate tasks from marks in agenda, no more effort to manage the work.
- Automatically list high priority tasks.
- Group tasks according to date, arrange the work more wisely.
- Show overdue tasks automatically, in case you forget.
- Set repetable tasks, and notify you in the agenda periodically.

* Automatically Kanban
- Automatically generate all items from document headings.
- Automatically update note content from Kanban, and another way around.
- Support drag gestures on Mac and iPad.

* Capture and Materials management
- Capture text, image, audio, video, link from other apps.
- Use those materials in your document anytime, anywhere.
- Material management center.

* Task Management
- Track any paragraph by setting status to it.
- Add date and time to arrange the task.
- Set priority
- Agenda to gather and manage all tasks.

* Bi-direction document linking
- Create document link, and generate bi-direction link automatically
- Paragraph level link

* Document management
- Hierarchy-based document system.
- Apply multiple tags to paragraphs.
- Status, date, and time can also be used to find your content.
- Documents, event paragraphs in it can be moved around easily.
- Full-text search.
- Mark your favorite document, find them directly.

* iCloud sync
Automatically sync to your iCloud account, keep your data safe, and keep all devices the same.

* Publish to blog platforms
We support directly publish articles to blog platforms, if the platform we have now didn't contain the one you are using, please let us know.

And we can publish attachments too!

* Export to other formats
- HTML, text, image, PDF, Markdown.

For more information about Nebula please visit

Privacy policy:
Terms of service:
Twitter: @nebulaapp1

What’s New

Version 1.3.6

New features:
New Agenda, much easier to manage the task status, tags, priority.
Material manage now includ all attachments.

Fix when renaming document, didn't correctly rename those opening documents.
Improved opening speed.
In editor now high light the current line.
Fix when update task status, not update in agenda and kanban.
Improve interaction with image attachment in editor.
Fix cursor location misplaced when paste text.
Fix selection range can't adjust in iPhone and iPad.
Fix some customized settings didn't load in time after sync.

Ratings and Reviews

3.5 out of 5
2 Ratings

2 Ratings

loureedtunes ,

Great start

Unique in the notes category.

JosephHonestReviews ,

App has many bugs - Almost unusable

I write this on April 28, 2021.

The app looked promising, and I did the mistake of unlocking all the features, and paying for it.

Unfortunately the developer has to fix many bugs that crash the app almost constantly. I have hope he will fix it.

As of now adding images to capture in the app crashes it, the agenda does not do anything, the custom Kanban status crashes it.

Please work on it, I have hope it can be useful, but it needs a lot more testing to be really usable.

Developer Response ,

Hi, please take a look at the new version 1.34 to see if those crash still there



Hi Joseph,

Really sorry for causing the problem, I noticed you are on macOS, could you please provide your mac’s model, we will try the best to fix any bug reported, and thank you very much for the support, I feel sorry for the unpleasant experience, fix will be released asap, in the mean while, it will be extremely helpful that if you give us some more info on those bugs, there is a build in feedback button on the top left corner to put mort text, once we located the source of the crashing you met, a new fix will be released.


App Privacy

The developer, luo xu, 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 Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

More By This Developer

You Might Also Like