Comparison

Diigo Browser vs Cydog Browser

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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.

About

Cydog Browser

This mobile browser enhances security with customizable features and an offline database for storing internet content. It offers a dedicated search with numerous engines and advanced encryption technologies to protect against cyber threats. An iMessage extension allows for secure, encrypted messaging.

Highlights
  • Enhanced mobile browser security
  • Offline database for internet content
  • Encrypted bookmarks and pictomarks
  • 40+ search engine integration
  • Proprietary anti-cookie and firewall tech
  • Deterrence decryption feature
  • Secure iMessage extension
Features
Read full description

TL;DR - Here's the bottom line on how our iOS Security & Social Browser works: Enhanced mobile browser security with easy customization. An offline database solution to store and catalog the internet safely, including Bookmarks and Pictomarks with bookmarks encrypted automatically. A dedicated search with over 40+ search engines. An option to purchase our proprietary anti-cookie potentiation and firewall technologies, including: the Walled Garden and the Wall Watcher. A deterrence decryption feature that allows users to view webpages relying on our new deterrence encryption technology. An iMessage extension to send encrypted text and picture messages securely. L;WR - Here's our long(er) explanation version: Mobile browsing can be a scary place. Hackers and Cyber Criminals have found innovative ways to target you on the devices and applications you use the most. Cydog Browser is a company which provides the world's leading web security for the masses. Our browser automatically blocks all non-secure http connections, leveraging Apple's App Transport Security (ATS) technology. This is the same technology Apple uses for its lockdown mode when users are being attacked by sophisticated hackers. Because we use this mode, you can't add code to reenable access to insecure connections, making your web connections more secure in the event of an application sandbox compromise. Our obfuscation mode creates web browsing entropy to make certain cyber-hijacks more difficult, decreasing Man-in-the-Middle (MitM) attacks, and our anti-cookie potentiation and web firewall technologies block insecure events, making a user's clicks an active cybersecurity technique to trick sophisticated hackers. This browser is meant for minimalists who want automated features without the cybersecurity hassles. We hope you enjoy better mobile browser security with Cydog Browser! Want to know more about Cydog Browser? Visit: cydogbrowser.com

Screenshots

Diigo Browser4 screens
Cydog Browser4 screens

Verdict

The call

The clearest difference is rating: Diigo Browser at 4.5 against Cydog Browser's 3.3. Diigo Browser also leads on in-app purchases (none vs 4) and ratings volume (563 vs 10). Cydog Browser's advantage is device support (4 vs 2). On price, update cadence, ads and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Cydog Browser sells 4 one-off in-app purchases. Diigo Browser asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Diigo Browser holds the better App Store score, 4.5 against 3.3. That said, the two scores are not equally well evidenced: Diigo Browser has 563 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 59% of Diigo Browser's written reviews are positive against 44% of Cydog Browser's.

UpkeepUpdate frequency

Diigo Browser ships an update every 2 weeks, Cydog Browser every 10 days. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Diigo Browser versus Cydog Browser: the parameters behind the verdict, then further details
ParameterDiigo BrowserCydog Browser
PriceFreeFree
Rating4.5 (563 ratings) — better3.3 (10 ratings)
Positive reviews58.7% of reviews — better44.4% of reviews
Number of ratings563 — better10
Update frequencyEvery 2 weeksEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS16.015.0 — better
Further details — not scored
Size172 MB80 MB
Age rating17+17+
DeveloperDiigo Inc.Matthew Benchimol

Customer experience

Diigo Browser

All ratings561 ratings
Positive87.7%
Neutral2.5%
Negative9.8%
Written reviews150 reviews
Positive58.7%
Neutral6.7%
Negative34.7%

Cydog Browser

All ratings11 ratings
Positive54.5%
Neutral9.1%
Negative36.4%
Written reviews9 reviews
Positive44.4%
Neutral11.1%
Negative44.4%

Bugs and requests

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

Cydog Browser

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Diigo Browser

No in-app purchases

4 purchases

Cydog Browser

One-time4
  • Cydog Walled Garden$0.99
  • Cydog Wall Watcher$0.99
  • Cydog Injector$0.99
Show 1 more
  • Cydog Iconography$0.99

Questions

Is Diigo Browser free?
Diigo Browser is free to download, with no in-app purchases.
Is Cydog Browser free?
Cydog Browser is free to download, with in-app purchases available.
Which has better reviews, Diigo Browser or Cydog Browser?
Diigo Browser is rated higher. Diigo Browser averages 4.5 out of 5 from 563 ratings, while Cydog Browser averages 3.3 from 10 ratings.
Do Diigo Browser or Cydog Browser have ads?
Neither Diigo Browser nor Cydog Browser shows ads.
Which is updated more often, Diigo Browser or Cydog Browser?
Diigo Browser ships an update every 2 weeks, and Cydog Browser every 10 days. Most recently, Diigo Browser was updated on October 26, 2026 and Cydog Browser on October 24, 2026.

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