Comparison

IDFA & Device Info Viewer vs Knock Knock

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

Head to head
About

IDFA & Device Info Viewer

Access your device's advertising ID (IDFA) and detailed technical specifications. View, copy, and share system information like model, OS, and storage. Designed for developers and curious users, it offers advanced insights through rewarded videos.

Highlights
  • View and copy IDFA
  • Access system details (model, OS, resolution, battery)
  • Unlock extended info (IDFV, region, time zone, storage, memory, CPU)
  • Export or share data
  • No logins or clutter
  • Advanced insights via rewarded video
Features
Read full description

IDFA & Info Checker helps you quickly access your iOS device's advertising ID (IDFA) and technical specs. Whether you're a developer, tester, or just curious, this app gives you everything you need: View and copy your IDFA Get system details (model, OS, resolution, battery) Unlock extended info like IDFV, region, time zone, storage, memory, CPU Export or share your data easily Designed for simplicity — no logins, no clutter Advanced insights are available via rewarded video. Built for developers. Useful for everyone.

About

Knock Knock

Features
Read full description

Tired of the complexities of managing visitors, services, and community updates in your building? Knock Knock, a powerful gate management system, offers a seamless and efficient solution. Key Features: Simplify Daily Services: Effortlessly manage your maid, doctor, gardener, and other daily service providers. Schedule appointments and maintain a clear record. Hassle-Free Visitor Entry: Utilize the pre-approve feature to add guests, ensuring they experience smooth entry without gate verification delays. Stay Informed with Events: Never miss a community gathering! Receive instant notifications about upcoming events and important announcements. Easy Complaint Reporting: Lodge complaints quickly and efficiently through the app, ensuring prompt attention to issues within your society. Comprehensive Visitor Management: Track and manage all your visitors, whether they are on-gate, approved, delivering parcels, or in your history. Receive real-time notifications to approve or deny entry. Connect with Your Society: Access a directory of all my society members, fostering better communication and community engagement. Quick Access to Emergency Numbers: Find crucial emergency contact numbers related to your flat and building in one convenient place. Digital Notice Board: Stay updated with important notice management announcements and updates from the building administration. Know Your Guards: Access essential guard details for enhanced security and communication. Manage Family Members: Easily add or manage family members residing in your apartment. Instant Visitor Notifications: Get real-time alerts and the power to approve or deny entry when a visitor arrives at your gate. Knock Knock revolutionizes gate management, providing residents with a secure, convenient, and connected living experience. Download today and experience the future of community management!

Screenshots

IDFA & Device Info Viewer4 screens
Knock Knock4 screens

Verdict

The call

The clearest difference is ads: Knock Knock at none against IDFA & Device Info Viewer's shown. Knock Knock also leads on update cadence (every 5 days vs every 3 weeks) and iOS requirement (13.0 vs 15.6). On price, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

IDFA & Device Info Viewer ships an update every 3 weeks, Knock Knock every 5 days. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
IDFA & Device Info Viewer versus Knock Knock: the parameters behind the verdict, then further details
ParameterIDFA & Device Info ViewerKnock Knock
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 weeksEvery 5 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size17 MB42 MB
Age rating4+4+
DeveloperRodrigo BellosoSarjan Patel

In-app purchases

None

IDFA & Device Info Viewer

No in-app purchases

None

Knock Knock

No in-app purchases

Questions

Is IDFA & Device Info Viewer free?
IDFA & Device Info Viewer is free to download, with no in-app purchases.
Is Knock Knock free?
Knock Knock is free to download, with no in-app purchases.
Do IDFA & Device Info Viewer or Knock Knock have ads?
IDFA & Device Info Viewer shows ads; Knock Knock does not.
Which is updated more often, IDFA & Device Info Viewer or Knock Knock?
IDFA & Device Info Viewer ships an update every 3 weeks, and Knock Knock every 5 days. Most recently, IDFA & Device Info Viewer was updated on November 5, 2026 and Knock Knock on October 28, 2026.

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