Comparison

Deep Whois vs Instant Checkmate

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

Head to head
About

Deep Whois

This app provides comprehensive WHOIS lookups for domains, IP addresses, and network ranges. It offers advanced features like historical data, change tracking, and notifications for domain expirations. Explore all domain zones and IP versions with seamless RDAP support.

Highlights
  • WHOIS lookup for domains, IPs, ASNs, and ENS
  • WHOIS history and change tracking
  • Domain expiration tracking with notifications
  • Supports all domain zones and IP versions (IPv4/IPv6)
  • Seamless RDAP support
  • Automatic WHOIS server selection
Features
Read full description

Deep Whois is the most complete and advanced Whois app with whois history, change and expiration tracking, notifications, color themes, RDAP and ENS. The tool lets you lookup info in ALL Whois databases for ALL hostnames, domains, TLDs, web sites, IDNs, IP addresses (both IPv4 and IPv6), IP network ranges, autonomous systems (ASNs, ISP IDs), and Ethereum Name Service (ENS) domains. Deep Whois works out of the box and finds ownership, country and more info about everything with no need to mess with complex options and server selection. FEATURES - Whois domains, IP addresses, ranges, IDNs and ASNs - Supports ALL domain zones, TLDs, IDNs known to date - Supports IPv4 and IPv6 addresses and networks - Support ARIN, RIPE, APNIC, LACNIC, AFRINIC and referral servers - Seamless RDAP support for domains where Whois is no longer available - Automatic selection of Whois servers - Trace across a chain of Whois servers (add "+trace" into query) - Digging Whois records from referrals - Result history for all lookups - Group results into multiple histories - E-mail Whois results PRO FEATURES - Whois history - Whois change and expiration tracking (for any domain) - Notifications - Color themes for Whois display - ENS: Lookup and track Ethereum Name Service domains/address If you love Deep Whois, try Deep Whois Pro for 7 days free! Go back in time with historical whois, track domain expiration, whois data changes with notifications, and do more with Deep Whois Pro. At confirmation of the Deep Whois Pro purchase, payment will be charged to your iTunes account, and it will be charged for renewal within 24-hours before the end of the current period. Automatic renewal can be turned off at any time in your Account Settings after purchase. After the cancellation of the renewal, Deep Whois Pro will expire at the end of the current period. DEMO VIDEOS http://j.mp/deepwhois_vids If you have any questions or comments, feel free to contact us at https://happymagenta.com/deepwhois/support.html Privacy Policy: https://www.unblip.com/tmp/privacy_and_terms/privacy.html Terms of Use: https://www.unblip.com/tmp/privacy_and_terms/terms.html

About

Instant Checkmate

Investigate addresses to uncover neighborhood details like potential residents, crime rates, and ownership history. This tool helps you learn about your surroundings before you move or for general safety awareness.

Highlights
  • Reverse address lookup
  • Neighbor identification
  • Neighborhood crime statistics
  • Census data
  • Ownership history
Features
Read full description

REVERSE PHONE NUMBER LOOKUP Are you receiving calls from an unknown number? Find the owner of a phone number with a quick search on the Instant Checkmate App. A Reverse Phone Lookup could find an owner's name, possible images, location history, social media profiles, and more. Get to the bottom of that mystery number with a simple search. Terms of Use Note: Instant Checkmate does not provide “consumer reports” and is not a “consumer reporting agency” as defined by the Fair Credit Reporting Act (FCRA). You may not use the products or services of Instant Checkmate to determine one’s eligibility for credit, housing, insurance, employment, or any other purpose subject to the FCRA. https://www.instantcheckmate.com/terms-of-use

Screenshots

Deep Whois4 screens
Instant Checkmate4 screens

Verdict

The call

The clearest difference is ads: Instant Checkmate at none against Deep Whois's shown. Instant Checkmate also leads on update cadence (every 3 weeks vs every 4 months) and ratings volume (1.3K vs 172). Deep Whois's advantage is review sentiment (85% vs 53%) and iOS requirement (13.4 vs 15.1). On price, rating, in-app purchases and monetization model 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. Deep Whois sells 4 in-app purchases, starting at $1.99 per 7 days and Instant Checkmate sells 7 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Instant Checkmate holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Instant Checkmate has 1.3K ratings behind it against 172, so its average is the more settled of the two. Written reviews complicate that: 85% of Deep Whois's written reviews are positive against 53% of Instant Checkmate's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Deep Whois ships an update every 4 months, Instant Checkmate every 3 weeks. The most recent releases landed on September 28, 2026 and October 21, 2026 respectively.

Scorecard5 real differences · 5 level
Deep Whois versus Instant Checkmate: the parameters behind the verdict, then further details
ParameterDeep WhoisInstant Checkmate
PriceFreeFree
Rating4.5 (172 ratings)4.7 (1.3K ratings) — better
Positive reviews85.4% of reviews — better53.3% of reviews
Number of ratings1721.3K — better
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.4 — better15.1
Further details — not scored
Size46 MB45 MB
Age rating4+12+
DeveloperPavel AhafonauPubrec, LLC

Customer experience

Deep Whois

All ratings172 ratings
Positive86.6%
Neutral4.1%
Negative9.3%
Written reviews247 reviews
Positive85.4%
Neutral2.4%
Negative12.1%

Instant Checkmate

All ratings1,269 ratings
Positive93.3%
Neutral2.4%
Negative4.3%
Written reviews75 reviews
Positive53.3%
Neutral2.7%
Negative44.0%

User reviews

Deep Whois

From 172 App Store ratings

What we love

  • 🚀 Fast and efficient
  • 👍 Simple and intuitive interface
  • 🔒 Provides detailed domain/IP information
  • 💡 Useful for troubleshooting network issues
  • 👍 Convenient for on-the-go use

Room to improve

  • 🐛 Occasional bugs and crashes
  • 🔍 Limited functionality compared to desktop tools
  • 💰 Paid version required for full features
  • 🔑 Privacy concerns with some user data

Instant Checkmate

From 1.3K App Store ratings

What we love

  • 👍 Great app
  • 🚀 Easy to use and informative
  • 💡 Helpful for finding people's contact info

Room to improve

  • 🐛 Inaccurate or outdated information
  • 💰 Expensive subscription
  • 🔒 Privacy concerns with sharing personal details
  • 🤯 Confusing or misleading features

Bugs and requests

Deep Whois

Reported bugs

3 issues
  • Incorrect location/ISP information for some IP addresses
  • Compatibility issues with newer iOS versions
  • Unreliable performance on older devices

Requested features

4 requests
  • Expand search capabilities (e.g., reverse IP lookup, domain history)
  • Add support for more domain registrars and TLDs
  • Implement dark mode and customization options
  • Improve integration with other network/security tools

Instant Checkmate

Reported bugs

3 issues
  • App crashes or freezes
  • Subscription issues and billing problems
  • Search results not loading properly

Requested features

3 requests
  • Option to do one-time checks without subscription
  • Improved data accuracy and reliability
  • Better customer support and refund policies

In-app purchases

4 purchases

Deep Whois

Subscriptions3
  • Deep Whois Pro (1 Week)$1.997 Days
  • Deep Whois Pro (1 Month)3 Days trial$3.991 Month
  • Deep Whois Pro (1 Year)7 Days trial$29.991 Year
One-time1
  • Deep Whois Plus (Lifetime)$0.99
7 purchases

Instant Checkmate

Subscriptions7
  • Unlimited Email Reports$2.991 Month
  • Unlimited Phone Reports$4.991 Month
  • Unlimited Premium Reports$34.991 Month
Show 4 more
  • Unlimited Premium Reports7 Days trial$34.991 Month
  • All Inclusive Reports$34.991 Month
  • All Inclusive Reports$37.991 Month
  • Unlimited Premium Reports$67.993 Months

Questions

Is Deep Whois free?
Deep Whois is free to download, with in-app purchases available.
Is Instant Checkmate free?
Instant Checkmate is free to download, with in-app purchases available.
Which has better reviews, Deep Whois or Instant Checkmate?
Instant Checkmate is rated higher. Deep Whois averages 4.5 out of 5 from 172 ratings, while Instant Checkmate averages 4.7 from 1.3K ratings.
Do Deep Whois or Instant Checkmate have ads?
Deep Whois shows ads; Instant Checkmate does not.
Which is updated more often, Deep Whois or Instant Checkmate?
Deep Whois ships an update every 4 months, and Instant Checkmate every 3 weeks. Most recently, Deep Whois was updated on September 28, 2026 and Instant Checkmate on October 21, 2026.

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