Domain Checker: DNS & SSL
WHOIS, Email & Security Check
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Cloud monitoring is here. Plus, Pro, and Pro+ users can run daily hosted checks for DNS, SSL, and domain expiry, with alerts and a new overview widget.
Domain Checker is a local-first domain monitoring and diagnostic tool for developers, website owners, IT administrators, and network professionals.
All domains are stored and inspected locally by default. Check DNS records, SSL certificates, HTTPS availability, WHOIS data, and email security settings from one clean interface.
LOCAL-FIRST MONITORING
Local inspection is available to every user and remains the default mode.
• Checks run when you open the app or manually refresh
• Individual and batch refresh are supported
• Cloud monitoring is not required
• Domains remain local unless you choose otherwise
OPTIONAL CLOUD MONITORING
Users with an eligible paid plan can enable daily cloud monitoring for selected domains.
• Selected domains are checked automatically each day
• The app does not need to remain open
• Important changes and expiration risks can generate notifications
• Individual or multiple domains can be enabled at once
• Domains can be returned to Local mode at any time
Purchasing a paid plan does not automatically upload your domains. Only domains you explicitly enable use cloud monitoring. All other domains remain in Local mode.
The Settings screen shows your current plan, cloud quota, enabled domains, and remaining capacity.
HOME SCREEN WIDGET
The medium widget provides an overview of:
• Total domains
• Cloud-managed domains
• Local domains
• Current plan
• Overall domain health
DNS RECORD LOOKUP
Inspect common DNS records:
• A and AAAA
• CNAME
• MX
• TXT
• NS
• SOA
• CAA
Review domain resolution, name servers, mail routing, verification records, and other DNS configuration.
SSL CERTIFICATE INSPECTION
Review HTTPS certificate and TLS information:
• Certificate issuer
• Validity period and expiration countdown
• Subject Alternative Names
• Certificate fingerprint
• Public key information
• TLS handshake status
Identify expired certificates and potential configuration issues before they affect your services.
HTTP RESPONSE ANALYSIS
Check website availability and HTTP behavior:
• HTTP status codes
• Response headers
• Redirect chains
• Server information
• HTTPS reachability
WHOIS AND DOMAIN INFORMATION
Review available public registration information:
• Registrar
• Registration and expiration dates
• Domain status
• Name servers
Availability depends on information returned by the relevant registry or registration data service.
EMAIL SECURITY CHECKS
Inspect email-related DNS configuration:
• MX records
• SPF records
• DMARC records
Identify common mail routing and domain protection issues. DKIM checks require a known selector and are not performed automatically without one.
MORE FEATURES
• Add and organize multiple domains
• Run individual or batch checks
• View expiration countdowns and health indicators
• Switch eligible domains between Local and Cloud modes
• Back up and restore local data
• Export domain reports as PDF
• Optimized for iPhone and iPad
Domain Checker brings DNS, SSL, HTTPS, WHOIS, and email security information together in one focused app.
Some capabilities depend on network availability, registry data, notification permissions, cloud service availability, and the selected in-app purchase.
Terms of Use:
https://domain.opshome.run/terms/
Apple Standard EULA:
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy:
https://domain.opshome.run/privacy/
Ratings & Reviews
1. Added optional daily Cloud Monitoring for eligible paid users.
2. Domains remain local by default and only use cloud monitoring when explicitly enabled.
3. Added individual and batch Cloud Monitoring controls.
4. Added cloud quota, usage, and entitlement information in Settings.
5. Added a medium Home Screen widget with overall domain statistics and health.
6. Improved purchase verification, device activation, cloud synchronization, and stability.
The developer, 超 张, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 超 张
- Size
- 7.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Domain Inspector Plus 50 $4.99
- Domain Inspector Starter 10 $1.99
- Domain Inspector Pro+ 500 $19.99
- Domain Inspector Pro 100 $8.99
- Copyright
- © 2026 Zhang Chao