# Diigo Browser vs Ninja Browser for iPhone

The clearest difference is rating: Ninja Browser for iPhone at 5.0 against Diigo Browser's 4.5. Ninja Browser for iPhone also leads on iOS requirement (10.0 vs 16.0). Diigo Browser's advantage is ads (none vs shown) and ratings volume (563 vs 3). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ninja Browser for iPhone holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Diigo Browser has 563 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 59% of Diigo Browser's written reviews are positive against 50% of Ninja Browser for iPhone's, so the app with the better star average is not the one people write more warmly about.

Diigo Browser ships an update every 2 weeks, Ninja Browser for iPhone fortnightly. The most recent releases landed on October 26, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Diigo Browser | Ninja Browser for iPhone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (563 ratings)](https://appshunter.io/ios/app/diigo-browser/id933773981/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ninja-browser-for-iphone/id1050555322/reviews)** |
| Number of ratings | **563** | 3 |
| Positive reviews | **58.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | **Free** | Ad-supported |
| Size | 172 MB | 20 MB |
| Requires iOS | 16.0 | **10.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Diigo Inc.](https://appshunter.io/developer/335006603) | [Sho Kurozumi](https://appshunter.io/developer/796307880) |

## What reviewers say

### Diigo Browser

[App page](https://appshunter.io/ios/app/diigo-browser/id933773981)

Save, sync, and annotate web pages and PDFs across devices. Easily share your saved content with highlights and sticky notes. Access your bookmarks anytime, anywhere.

**Highlights:** Save and sync bookmarks, Annotate web pages with highlights, Add sticky notes to web pages, Read saved PDF files, Share bookmarks with annotations, Cross-device access

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Useful for research and organization
- 👍 Syncs across devices
- 🚀 Efficient for bookmarking and annotating

**What reviewers complain about**

- 🐛 Buggy and crashes frequently
- 🔨 Lacking in features and functionality
- 🔍 Search and discovery issues
- 🔒 Login and sync problems

**Reported bugs**

- Login and sign-up issues
- Sync problems across devices
- Annotation and highlighting bugs
- Crashes and performance issues

**Requested features**

- Improved search and filtering
- Offline reading and caching
- Customizable organization and folders
- Better integration with other apps


### Ninja Browser for iPhone

[App page](https://appshunter.io/ios/app/ninja-browser-for-iphone/id1050555322)

Quickly conceal your browsing activity with a simple gesture. This app allows you to hide your screen instantly without any audible cues, ensuring your privacy is maintained.

**Highlights:** Instant screen hiding, Gesture controls (flick or multi-finger touch), Silent operation, Privacy enhancement

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

**In-app purchases:** none


## Frequently asked questions

### Is Diigo Browser free?

Diigo Browser is free to download, with no in-app purchases.

### Is Ninja Browser for iPhone free?

Ninja Browser for iPhone is free to download, with no in-app purchases.

### Which has better reviews, Diigo Browser or Ninja Browser for iPhone?

Ninja Browser for iPhone is rated higher. Diigo Browser averages 4.5 out of 5 from 563 ratings, while Ninja Browser for iPhone averages 5.0 from 3 ratings.

### Do Diigo Browser or Ninja Browser for iPhone have ads?

Ninja Browser for iPhone shows ads; Diigo Browser does not.

### Which is updated more often, Diigo Browser or Ninja Browser for iPhone?

Diigo Browser ships an update every 2 weeks, and Ninja Browser for iPhone fortnightly. Most recently, Diigo Browser was updated on October 26, 2026 and Ninja Browser for iPhone on October 21, 2026.

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