# Deep Whois vs Cross Check Security

The clearest difference is price: Deep Whois at Free against Cross Check Security's $0.99. Deep Whois also leads on ratings volume (172 vs 1) and update cadence (every 4 months vs every 9 months). Cross Check Security's advantage is rating (5.0 vs 4.5) and in-app purchases (none vs 4).

Deep Whois is free to download; Cross Check Security costs $0.99 up front. Deep Whois sells 4 in-app purchases, starting at $1.99 per 7 days. Cross Check Security asks for nothing beyond the download.

Cross Check Security holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Deep Whois has 172 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 85% of Deep Whois's written reviews are positive against 100% of Cross Check Security's.

Deep Whois ships an update every 4 months, Cross Check Security every 9 months. The most recent releases landed on September 23, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Deep Whois | Cross Check Security |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.5 (172 ratings)](https://appshunter.io/ios/app/deep-whois/id328895000/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cross-check-security/id6468893435/reviews)** |
| Number of ratings | **172** | 1 |
| Positive reviews | 85.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 9 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 46 MB | 10 MB |
| Requires iOS | **13.4** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Pavel Ahafonau](https://appshunter.io/developer/319585607) | [Christopher Shearer](https://appshunter.io/developer/1710828199) |

## What reviewers say

### Deep Whois

[App page](https://appshunter.io/ios/app/deep-whois/id328895000)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Deep Whois Pro (1 Week) | $1.99 | per 7 days |
| Deep Whois Pro (1 Month) | $3.99 | per month |
| Deep Whois Pro (1 Year) | $29.99 | per year |
| Deep Whois Plus (Lifetime) | $0.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**Requested features**

- 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


### Cross Check Security

[App page](https://appshunter.io/ios/app/cross-check-security/id6468893435)

Analyze files, URLs, and QR codes for security threats using VirusTotal reports. Modify complex URLs and create custom QR codes. Scan QR codes to preview content before activation.

**Highlights:** File analysis via VirusTotal, URL reporting and modification, QR code scanning, QR code generation, API key integration

**In-app purchases:** none


## Frequently asked questions

### Is Deep Whois free?

Deep Whois is free to download, with in-app purchases available.

### Is Cross Check Security free?

Cross Check Security costs $0.99, with no in-app purchases.

### Which has better reviews, Deep Whois or Cross Check Security?

Cross Check Security is rated higher. Deep Whois averages 4.5 out of 5 from 172 ratings, while Cross Check Security averages 5.0 from 1 ratings.

### Do Deep Whois or Cross Check Security have ads?

Deep Whois shows ads; Cross Check Security does not.

### Which is updated more often, Deep Whois or Cross Check Security?

Deep Whois ships an update every 4 months, and Cross Check Security every 9 months. Most recently, Deep Whois was updated on September 23, 2026 and Cross Check Security on September 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*