# Koala Browser vs Diigo Browser

The clearest difference is rating: Diigo Browser at 4.5 against Koala Browser's 2.9. Diigo Browser also leads on in-app purchases (none vs 1) and review sentiment (59% vs 32%). Koala Browser's advantage is iOS requirement (8.0 vs 16.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Koala Browser sells 1 one-off in-app purchase. Diigo Browser asks for nothing beyond the download.

Diigo Browser holds the better App Store score, 4.5 against 2.9. Both are backed by a comparable volume of ratings — 284 and 563 respectively. Written reviews point the same way: 32% of Koala Browser's written reviews are positive against 59% of Diigo Browser's.

Koala Browser ships an update every 2 months, Diigo Browser every 2 weeks. The most recent releases landed on October 21, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Koala Browser | Diigo Browser |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (284 ratings)](https://appshunter.io/ios/app/koala-browser-sleep-better/id788474204/reviews) | **[4.5 (563 ratings)](https://appshunter.io/ios/app/diigo-browser/id933773981/reviews)** |
| Number of ratings | 284 | **563** |
| Positive reviews | 32.2% of reviews | **58.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 20 MB | 172 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [AppRebel, Inc.](https://appshunter.io/developer/1227876283) | [Diigo Inc.](https://appshunter.io/developer/335006603) |

## What reviewers say

### Koala Browser

[App page](https://appshunter.io/ios/app/koala-browser-sleep-better/id788474204)

This web browser is designed to improve sleep quality by filtering out blue light emitted from device screens. It automatically adjusts display colors based on the time of day, creating a warmer tone at night to promote melatonin production.

**Highlights:** Automatic color temperature adjustment, Blue light filtering, Download and view files, Darkness Boost for low brightness, Private browsing, Multiple browser tabs

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |

**What reviewers like**

- 🚀 Reduces blue light
- 👍 Helpful for late night browsing
- 🌙 Restful on the eyes

**What reviewers complain about**

- 🐛 Crashes and freezes
- 🔋 Drains battery
- 💸 Excessive ads
- 🔒 Limited to browser only

**Reported bugs**

- Keyboard not dimmed
- Videos not properly filtered
- Inconsistent behavior when switching apps

**Requested features**

- Ability to filter blue light system-wide
- Option to adjust brightness/darkness level
- Support for more search engines beyond Google


### 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


## Frequently asked questions

### Is Koala Browser free?

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

### Is Diigo Browser free?

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

### Which has better reviews, Koala Browser or Diigo Browser?

Diigo Browser is rated higher. Koala Browser averages 2.9 out of 5 from 284 ratings, while Diigo Browser averages 4.5 from 563 ratings.

### Do Koala Browser or Diigo Browser have ads?

Neither Koala Browser nor Diigo Browser shows ads.

### Which is updated more often, Koala Browser or Diigo Browser?

Koala Browser ships an update every 2 months, and Diigo Browser every 2 weeks. Most recently, Koala Browser was updated on October 21, 2026 and Diigo Browser on October 26, 2026.

---

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