Header Watch
Security Header Monitor
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Keep watch on any site's HTTP security headers. Get an instant A-to-F grade, automatic background checks, and an alert the moment a site's protection changes.
Header Watch keeps a silent eye on the security headers of any website you care about. Drop in a URL, let it scan, and you get a baseline snapshot. From then on, it checks automatically in the background and notifies you the moment anything changes.
Security headers like Content Security Policy, HSTS, X-Frame-Options, and Permissions-Policy are easy to misconfigure during a deployment, a server migration, or a routine update — and just as easy to miss. Header Watch catches the drift so you don't have to.
Add any URL you want to watch. Header Watch fetches the headers, grades them, and stores a baseline. Background checks run every 1, 6, or 24 hours depending on what you set. When something changes you get a push notification with a summary of exactly what was added, removed, or altered.
The drift event log keeps a full history of every change, so you can see precisely when a header was removed or a value was modified. Each watch shows a side-by-side comparison between the baseline and the current state.
Built for developers monitoring their own sites, security engineers keeping tabs on third-party services, or anyone who wants to know the moment a Content Security Policy quietly disappears after a CDN update.
No account required. Everything runs on device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
This update fixes an issue where adding a URL could fail with a session error. Adding and monitoring sites now works reliably. Thanks for using Header Watch.
The developer, Keith Batterham, 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
- Keith Batterham
- Size
- 38.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 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+
- Copyright
- © 2026 Keith Batterham