Mobile App Updates Handling Deep Links After a Domain Shift

When a business rebrands and migrates to a new domain, one of the most complex and frequently underestimated challenges arises within its mobile applications, particularly in managing deep links. Deep linking allows apps to open specific screens or content directly via URLs, creating a seamless bridge between web properties and in-app experiences. These links are integral to user acquisition campaigns, push notifications, email campaigns, social shares, and third-party integrations. A domain change fundamentally alters the structure of these links, and if not managed with precision, it can result in broken experiences, lost engagement, user frustration, and even app store penalties due to degraded functionality.

The first task in handling deep links after a domain shift is conducting a complete audit of all the app’s deep linking implementations. This includes both traditional HTTP/HTTPS deep links and app-specific URI schemes. HTTP deep links are especially vulnerable in a domain transition, as they directly reference the web domain. A deep link that previously pointed to https://oldbrand.com/product/123 will no longer resolve correctly once the domain has changed to https://newbrand.com, unless the link is properly redirected or remapped within the app’s code and server infrastructure. This audit should also include tracking links used in marketing automation platforms, deferred deep linking tools, and QR code campaigns.

For Android applications, deep links are commonly configured using intent filters in the AndroidManifest.xml file, which specifies the domains and URL paths that the app can handle. After a domain shift, the manifest must be updated to include the new domain and its associated path structure. More importantly, the Digital Asset Links file, which lives at https://newbrand.com/.well-known/assetlinks.json, must be created and hosted to verify the association between the app and the new domain. This file allows Android to securely confirm that the domain and the app are legitimately connected, enabling seamless handling of links through Android App Links. Failure to update or properly configure this file will cause Android to fall back to opening links in the browser, disrupting the intended user experience.

iOS apps face similar requirements through the use of Universal Links. These are configured using entitlements and associated domains listed in the app’s capabilities. Like Android, iOS requires the domain to serve an apple-app-site-association file at https://newbrand.com/.well-known/apple-app-site-association. This JSON file details which paths the app can open and must match what’s declared in the app. Without this association in place, iOS will not open the app when a link is tapped, instead routing users to Safari or the App Store. The file must be accessible over HTTPS with no redirects and a valid certificate—requirements that make setup sensitive to misconfiguration during a domain transition.

From a server perspective, a full suite of 301 redirects must be implemented to ensure that deep links using the old domain continue to resolve accurately. These redirects must be mapped to their exact app route equivalents to preserve context. Redirecting to a generic landing page is insufficient and harms user experience. For deferred deep linking—where a user who does not yet have the app is directed to install it, and then taken to the intended in-app location after launch—the redirection logic becomes even more complex. Tools like Branch, Firebase Dynamic Links, Adjust, or AppsFlyer must be reconfigured to recognize and route new domain links correctly, while also maintaining fallback behavior for legacy links.

Marketing materials and campaigns need to be updated in tandem. Deep links are often embedded in SMS messages, emails, social media promotions, and app install banners. These campaigns may be running across dozens of platforms and channels, many of which cache or archive content. It’s crucial to either update these assets where possible or ensure that existing links to the old domain are robustly redirected to new equivalents. UTM parameters and campaign attribution tags must also be preserved across redirects to ensure proper analytics tracking.

Testing is essential at every stage of the transition. QA teams must conduct device-level tests across both platforms, ensuring that links open correctly under various conditions—when the app is installed, not installed, in the background, or force-closed. Testing should also include edge cases such as internationalized domains, custom app schemes, and authentication flows triggered by deep links. Breakage in any of these scenarios can result in user drop-off, incomplete conversions, or even negative app reviews.

Push notifications and in-app messaging are often overlooked during domain transitions. These messages frequently contain deep links to product pages, promotional content, or user-specific dashboards. Mobile SDKs used to manage these messages must be audited and updated with the new domain structure to avoid pushing non-functional links to users. If users tap a link that leads nowhere or opens a browser instead of the app, it damages brand credibility and lowers engagement metrics.

Analytics and attribution tracking also require careful revision. Deep links are closely tied to user journey measurement. If attribution platforms are still logging data using the old domain, reporting will become fragmented. It’s essential to update all tracking parameters, domain-level event mappings, and funnel visualizations to reflect the new structure. This ensures that marketing teams can accurately evaluate the performance of post-rebrand campaigns and adjust strategies accordingly.

Finally, developers must plan for backward compatibility. Some users may still have older versions of the app installed that recognize only the previous domain. To prevent these users from losing functionality, fallback logic should be built into the app to gracefully handle incoming links from either domain. This can involve conditional routing, hybrid linking strategies, or maintaining both sets of domain associations during the transition window.

Handling deep links after a domain rebrand is not merely a matter of updating URLs. It requires a synchronized effort across mobile development, backend engineering, marketing, and product management. By treating deep link continuity as a core component of the rebranding strategy, businesses can ensure that their mobile presence remains robust, responsive, and user-friendly—preserving user trust, engagement, and conversion rates even as the underlying brand identity evolves.

When a business rebrands and migrates to a new domain, one of the most complex and frequently underestimated challenges arises within its mobile applications, particularly in managing deep links. Deep linking allows apps to open specific screens or content directly via URLs, creating a seamless bridge between web properties and in-app experiences. These links are…