Nautilus vs Nekobi AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Nautilus
This app is a research-focused web browser and writing tool for iPad and iPhone. It allows users to read, annotate web pages and PDFs, and use AI for summarization and content generation. The app also supports document creation and organization, syncing across cloud services.
- Web browsing with research tools
- AI-powered page summarization and translation
- Direct annotation on web pages and PDFs
- Export markup as PDF, Word, or Markdown
- Integrated document drafting and organization
- Cloud syncing with Dropbox, Google Drive, and iCloud
- Lecture and interview recording with transcripts
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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/
Nekobi AI
This offline AI assistant helps professionals and non-English speakers translate, polish, and summarize documents securely. It integrates with email clients to prioritize important messages, ensuring privacy and boosting productivity without recurring fees.
- Offline AI processing
- Text translation to English
- Document summarization
- Email prioritization
- Secure data handling
- One-time purchase
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Unlock the full potential of your device with Nekobi AI — Offline AI Assistant for professionals and non-English Speakers. Translate, polish, and summarize documents confidently—completely offline. Communicate clearly. Summarize confidently. Stay fully in control. Nekobi AI is the offline AI assistant designed for professionals and non-English speakers who demand speed, clarity, and privacy. Polish & Translate Any Text • Instantly turn drafts, emails, reports, or presentations into fluent, professional English. • Translate from any language into polished English for global communication. • Perfect for professionals, students, and non-native English speakers who need accuracy and confidence. Summarize Documents Securely • Extract key points from reports, contracts, PDFs, and Docx files. • All processing happens offline—your data never leaves your device. • Ideal for confidential or sensitive work where privacy matters most. Boost Productivity with Smart Email Prioritization • Integrates securely with Gmail and Outlook. • Highlight urgent emails, hide distractions, and save hours every day. • Focus on what truly matters without risking sensitive information. Privacy & Control First • Fully offline AI ensures total privacy. • One-time purchase, no subscriptions, no recurring fees. • Designed for executives, consultants, freelancers, and global professionals. System Requirements: • iPhone 12 Pro or newer (best performance) • iOS 17.0 or later • 4 GB RAM minimum (6 GB recommended) • 3 GB free storage Download Nekobi AI today – write professionally, translate confidently, summarize securely, and stay fully in control of your sensitive work.
Screenshots
Verdict
The clearest difference is review sentiment: Nekobi AI at 100% against Nautilus's 48%. Nekobi AI also leads on in-app purchases (none vs 3) and rating (5.0 vs 4.6). Nautilus's advantage is price (Free vs $3.99) and ratings volume (3.2K vs 3). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Nautilus is free to download; Nekobi AI costs $3.99 up front. Nautilus sells 3 in-app purchases, starting at $3.99 per month. Nekobi AI asks for nothing beyond the download.
Nekobi AI holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Nautilus has 3.2K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 48% of Nautilus's written reviews are positive against 100% of Nekobi AI's.
Nautilus ships an update fortnightly, Nekobi AI weekly. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.
| Parameter | Nautilus | Nekobi AI |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 4.6 (3.2K ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 48.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 3.2K — better | 3 |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 502 MB | 2.4 GB |
| Age rating | 17+ | 4+ |
| Developer | Kairoos Solutions SL | NEKOBI AI SOLUTIONS LLC |
Customer experience
Nautilus
Nekobi AI
Bugs and requests
Nautilus
Reported bugs
5 issues- Notes randomly disappearing
- Formatting issues with text and images
- Unreliable audio recording and playback
- Compatibility problems with newer iOS versions
- Inability to transfer files between free and pro versions
Requested features
5 requests- Handwriting recognition
- Improved eraser and shape tools
- Customizable keyboard and toolbar
- Better integration with cloud storage
- Ability to rotate and resize images
Nekobi AI
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Nautilus
- Nautilus Unlock All and AI3 Days trial$3.991 Month
- Nautilus Unlock All and AI3 Days trial$14.991 Year
- Nautilus Pro Lifetime$14.99
Nekobi AI
No in-app purchases





