Nautilus: Web, Docs, Annotate
Web browser, PDF, AI Assistant
Free · In-App Purchases · Designed for iPad
From first search to final draft. Browse, annotate, ask AI, save clippings and write in one research browser.
Nautilus is a web browser built for research. Read the web, mark it up, ask AI about what you find, and write up your work without leaving the app, on iPad and iPhone.
Students, researchers, journalists, writers and professionals use it to go from first search to finished document in one place.
Browse with research tools built in
Open pages in tabs, pin the ones you come back to, and keep sites in bookmarks and history. Switch to Reader for a clean page without distractions, or let Reader turn on automatically. Request the desktop version of a site when you need it.
Understand any page
Ask AI about the page you're reading. Summarize a long article, or translate a page into your language or into English, then switch back to the original at any time.
Circle it with Magic Lasso
Circle a passage, chart or image on a page. Ask AI to explain it, ask your own question, highlight it, or save it as a clip on your Clippings board so your findings stay together.
Mark up the web
Draw and write directly on web pages. Export a page with your markup as a PDF in A4, Letter or Legal size, or as a Word document, Markdown, RTF, plain text or an image.
Read and annotate your sources
Open PDFs, papers and reports in tabs beside your web pages. Highlight, write in the margins, add comments, and compare two documents side by side. Fill and sign forms, scan paper pages into PDFs, measure scaled drawings, and hide sensitive text before you share.
Write it up
Draft in Word documents, RTF, Markdown or plain text. Plan a long paper or book section by section on a Corkboard, keep your sources open next to the draft, take snapshots of earlier versions, and compile everything into one document or ebook. Study Projects gather the readings for each subject in one place.
AI help from first idea to final draft
Chat through ideas, ask about your own documents, and get explanations. Rewrite, simplify, correct spelling and grammar, change the tone, or translate what you've written.
Also in Nautilus
Record lectures and interviews and create transcripts. Connect ideas on whiteboards with sticky notes, organize plans in outlines, and work through calculations and charts in Math Notebooks.
Your library, safe and in sync
Keep documents in folders and notebooks with covers, and find anything with search. Export to PDF, Word, HTML, EPUB and more. Sync with iCloud, Dropbox, Box, Google Drive or WebDAV. Automatic saving, recovery and backups protect your work, and passcodes lock the app or private folders.
Formerly Notes Writer Pro
Nautilus is the new name of Notes Writer Pro. Your existing PDF notes and outlines open here.
Privacy Policy
http://www.noteswriter.com/Kairoos_Privacy_Policy.html
Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
- Fixed several bugs and app crashes, improved performance
- Notes Writer Pro is now Nautilus! New user interface, new features and new app icon!
- iPhone Duo and iOS 27 ready! Huge major UI/UX app update! Now Microsoft Word and LaTeX compatible documents!
- We update Nautilus frequently to make it even better. Each update has product improvements or bug fixes. If you enjoy using the app, please leave us a review!
The developer, Kairoos Solutions SL, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kairoos Solutions S.L.
- Size
- 498 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 77 more
- English, Afrikaans, Albanian, Amharic, Arabic, Armenian, Azerbaijani, Basque, Bengali, Bulgarian, Burmese, Cambodian, Catalan, Croatian, Czech, Danish, Dutch, Estonian, Filipino, Finnish, French, Galician, Georgian, German, Greek, Gujarati, Hausa, Hebrew, Hindi, Hungarian, Icelandic, Igbo, Indonesian, Irish, Italian, Japanese, Javanese, Kannada, Kazakh, Korean, Laotian, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Marathi, Nepali, Norwegian Bokmål, Oriya, Pashto, Persian, Polish, Portuguese, Punjabi, Romanian, Russian, Serbian, Simplified Chinese, Singhalese, Slovak, Slovenian, Spanish, Swahili, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Uzbek, Vietnamese, Welsh, Xhosa, Yoruba, Zulu
- Age Rating
16+
- 16+
- In-App Purchases
Yes
- Nautilus Unlock All and AI $5.49
- Nautilus Unlock All and AI $20.99
- Nautilus Pro Lifetime $20.99
- Copyright
- © 2026 Kairoos Solutions
