# Nautilus vs Nekobi AI

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.

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.

## The numbers

| Metric | Nautilus | Nekobi AI |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [4.6 (3.2K ratings)](https://appshunter.io/ios/app/nautilus-web-word-annotate/id1422480068/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/nekobi-ai/id6753140127/reviews)** |
| Number of ratings | **3.2K** | 3 |
| Positive reviews | 48.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | **Freemium** | Paid |
| Size | 502 MB | 2.4 GB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Kairoos Solutions SL](https://appshunter.io/developer/978066434) | [NEKOBI AI SOLUTIONS LLC](https://appshunter.io/developer/436693300) |

## What reviewers say

### Nautilus

[App page](https://appshunter.io/ios/app/nautilus-web-word-annotate/id1422480068)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nautilus Unlock All and AI | $3.99 | per month |
| Nautilus Unlock All and AI | $14.99 | per year |
| Nautilus Pro Lifetime | $14.99 | one-time |

**What reviewers like**

- 🚀 Excellent note-taking app
- 📁 Great folder organization
- 🎨 Customizable notebook covers
- 🔍 Useful PDF annotation tools
- 🤖 Impressive AI capabilities

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🔄 Sync and file transfer issues
- 🕰️ Slow performance and lag
- 🔒 Poor customer support
- 💰 Misleading upgrade pricing

**Reported bugs**

- 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**

- Handwriting recognition
- Improved eraser and shape tools
- Customizable keyboard and toolbar
- Better integration with cloud storage
- Ability to rotate and resize images


### Nekobi AI

[App page](https://appshunter.io/ios/app/nekobi-ai/id6753140127)

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.

**Highlights:** Offline AI processing, Text translation to English, Document summarization, Email prioritization, Secure data handling, One-time purchase

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nautilus free?

Nautilus is free to download, with in-app purchases available.

### Is Nekobi AI free?

Nekobi AI costs $3.99, with no in-app purchases.

### Which has better reviews, Nautilus or Nekobi AI?

Nekobi AI is rated higher. Nautilus averages 4.6 out of 5 from 3.2K ratings, while Nekobi AI averages 5.0 from 3 ratings.

### Do Nautilus or Nekobi AI have ads?

Neither Nautilus nor Nekobi AI shows ads.

### Which is updated more often, Nautilus or Nekobi AI?

Nautilus ships an update fortnightly, and Nekobi AI weekly. Most recently, Nautilus was updated on November 6, 2026 and Nekobi AI on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*