Comparison

Spyden vs Duo Viewer

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

Head to head
About

Spyden

Features
Read full description

Your smartphone holds your most personal information, making privacy and device protection more important than ever. Spyden: Security & Privacy is designed to help users stay aware of potential risks, protect their phones from unauthorized access, and maintain better control over device security. With intelligent monitoring tools and real-time alerts, Spyden supports safer phone usage at home, work, and in public spaces. Spyden focuses on awareness and prevention rather than complex technical settings. The app provides easy-to-use tools that help you understand what is happening around your device and respond quickly when something unusual occurs. Whether you are concerned about wireless activity, phone movement, or overall protection status, Spyden helps you stay informed with confidence. Bluetooth Scanner Spyden includes a Bluetooth Scanner that helps you view nearby Bluetooth-enabled devices in your surroundings. This feature allows you to stay aware of wireless activity around your phone, especially in unfamiliar locations. Detected devices can be reviewed and marked as safe or unsafe, helping you maintain clarity and peace of mind when Bluetooth connections are active. Snooper Catcher Unauthorized access to your phone can compromise your privacy. Snooper Catcher helps address this risk by discreetly capturing a photo when someone attempts to unlock your device incorrectly. Each attempt is recorded with the time, giving you clear visibility into access attempts and helping you identify unwanted phone usage when your device is unattended. Light Spy Detector The Light Spy Detector helps protect your phone from physical interference. When enabled, it triggers an alert if someone tries to move or pick up your device by detecting changes in light exposure. This feature is useful in offices, public spaces, or shared environments where phone safety is a concern. IF Light Scanner Some surveillance tools emit infrared light that is not visible to the human eye. The IF Light Scanner uses your phone’s camera to highlight unusual infrared reflections around you. This feature supports greater awareness in private or unfamiliar spaces and helps users feel more confident about their surroundings. Device Security Score SpyShield provides a Device Security Score that shows how well your phone is protected based on active features and settings. This simple overview helps users understand their current protection level and encourages safer device habits without technical complexity. Free App with Premium Upgrade Spyden is free to download and includes limited feature access. Users who want full protection can upgrade to premium to unlock all features. A three-day free trial is available for new users, allowing full access before choosing a subscription. Weekly, monthly, and yearly subscription options are offered, with easy management through Apple ID settings. Privacy policy: https://docs.google.com/document/d/13vqo7iBU8hW5vmlFv-tOGqasI89mg5L9x0llWIq3oFI/edit?usp=sharing Terms and conditions: https://docs.google.com/document/d/18yaUU8hDFZXlfNC460gAihACU3CMKPy8PZiAhvBJgUc/edit?usp=sharing Subscription terms: https://docs.google.com/document/d/1iBExMgr902cIkkuLzr2oMbab8EeHUdE6J0BWu5wGGhU/edit?usp=sharing

About

Duo Viewer

Read full description

Make room for two with Duo Viewer, a split-screen browser and file viewer for iPhone. YOUR FAVOURITE WEB APPS, TOGETHER Open two websites on one screen. Compare pages, browse social feeds alongside online video, or keep a reference page within view. Drag the divider to adjust your workspace, minimise a pane when you need more room, and turn your iPhone for a landscape layout. FILES BESIDE THE WEB Import files from the Files app and organise them in Duo Viewer. View PDFs, supported Office and iWork documents, images, text, audio, and video alongside a website or another file. MAKE IT YOUR WORKSPACE β€’ Browse websites in two panes β€’ Save bookmarks and revisit recent addresses β€’ Open links in the other pane β€’ Resize panes and use portrait or landscape mode β€’ Import, view, rename, and delete supported files β€’ Resume your saved workspace

Screenshots

Spyden4 screens
Duo Viewer4 screens

Verdict

The call

The clearest difference is iOS requirement: Spyden at 17.0 against Duo Viewer's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Spyden sells 3 in-app purchases, starting at $7.99 per 7 days and Duo Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference Β· 5 level
Spyden versus Duo Viewer: the parameters behind the verdict, then further details
ParameterSpydenDuo Viewer
PriceFreeFree
Update frequencyMonthlyβ€”
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad β€” betteriPhone
Requires iOS17.0 β€” better26.0
Further details β€” not scored
Size59 MB2 MB
Age rating4+17+
DeveloperFAST BROWSERLiangjun Song

In-app purchases

3 purchases

Spyden

Subscriptions3
  • Weekly Premium Subscription3 Days trial$7.997 Days
  • Monthly Premium Access$14.991 Month
  • Yearly Premium Access$39.991 Year
1 purchases

Duo Viewer

One-time1
  • Duo Viewer Pro$6.99

Questions

Is Spyden free?
Spyden is free to download, with in-app purchases available.
Is Duo Viewer free?
Duo Viewer is free to download, with in-app purchases available.
Do Spyden or Duo Viewer have ads?
Neither Spyden nor Duo Viewer shows ads.

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