Koala Browser vs Diigo Browser
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Koala Browser
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.
- Automatic color temperature adjustment
- Blue light filtering
- Download and view files
- Darkness Boost for low brightness
- Private browsing
- Multiple browser tabs
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Sleep better with Koala™! A faster web browser with downloads, that improves the quality of your sleep! Research has demonstrated that nighttime light exposure suppresses the production of melatonin, the major hormone that controls sleep and wake cycles. The "blue", short-wavelength light is the most melatonin-suppressive, and is also emitted by devices such as televisions, computer screens, and cellphones. (Note: Koala dimming effect only works while inside the app!) The Koala™ Web Browser filters out the blue light to create a healthy, energizing sleep cycle. It is the first web browser that cares about your sleep quality! Koala™ makes the color of your iDevice display adapt to the time of day, warm at night and like sunlight during the day. All automatically! FEATURES * Automatically adjust the color temperature depending on your local time and sunset/sunrise times * DOWNLOAD and view files! * Darkness Boost for lower brightness during the night * Multiple browser tabs * Private browsing * History and Bookmarks * Sharing to Twitter, Facebook, Email, Text, WhatsApp etc * Select search engine (Google, Yahoo!, Bing, DuckDuckGo) * More features coming soon!
Diigo Browser
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.
- 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
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Diigo Browser allows you to save, annotate and share bookmarks easily! Save and sync You can use Diigo Browser to save web pages to your Diigo account and the bookmarks will sync across your devices so that you can access them anytime, anywhere later. Annotate while reading Diigo Browser allows you to annotate web pages with highlights and sticky notes. The annotate button will pop up in the context menu after you select some text! PDF reading You can read your saved PDF files within the app directly and we will consider supporting PDF annotation in the future! Share easily You can share your bookmarks with annotations to others through email or IM or send it to other apps easily. We will keep working on the improvements of Diigo Browser to make it better and better. Please feel free to contact us at care@diigo.com if you have any questions or suggestions.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Koala Browser | Diigo Browser |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (284 ratings) | 4.5 (563 ratings) — better |
| Positive reviews | 32.2% of reviews | 58.7% of reviews — better |
| Number of ratings | 284 | 563 — better |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 20 MB | 172 MB |
| Age rating | 17+ | 17+ |
| Developer | AppRebel, Inc. | Diigo Inc. |
Customer experience
Koala Browser
Diigo Browser
User reviews
Koala Browser
From 284 App Store ratingsWhat we love
- 🚀 Reduces blue light
- 👍 Helpful for late night browsing
- 🌙 Restful on the eyes
Room to improve
- 🐛 Crashes and freezes
- 🔋 Drains battery
- 💸 Excessive ads
- 🔒 Limited to browser only
Diigo Browser
From 563 App Store ratingsWhat we love
- 💡 Useful for research and organization
- 👍 Syncs across devices
- 🚀 Efficient for bookmarking and annotating
Room to improve
- 🐛 Buggy and crashes frequently
- 🔨 Lacking in features and functionality
- 🔍 Search and discovery issues
- 🔒 Login and sync problems
Bugs and requests
Koala Browser
Reported bugs
3 issues- Keyboard not dimmed
- Videos not properly filtered
- Inconsistent behavior when switching apps
Requested features
3 requests- Ability to filter blue light system-wide
- Option to adjust brightness/darkness level
- Support for more search engines beyond Google
Diigo Browser
Reported bugs
4 issues- Login and sign-up issues
- Sync problems across devices
- Annotation and highlighting bugs
- Crashes and performance issues
Requested features
4 requests- Improved search and filtering
- Offline reading and caching
- Customizable organization and folders
- Better integration with other apps
In-app purchases
Koala Browser
- Remove Ads$2.99
Diigo Browser
No in-app purchases
Questions
Is Koala Browser free?
Is Diigo Browser free?
Which has better reviews, Koala Browser or Diigo Browser?
Do Koala Browser or Diigo Browser have ads?
Which is updated more often, Koala Browser or Diigo Browser?
Other comparisons
