How to Add Deferred Deep Linking to Your iOS App
Article Summary
Bartek Krason and Mateusz Turbański break down the iOS attribution gap that kills user onboarding. Their solution: deferred deep linking that survives app installation and routes users exactly where they intended to go.
This technical guide from Software Mansion walks through implementing deferred deep linking in iOS apps using Detour, their developer-focused SDK. Unlike standard deep links that only work when apps are installed, deferred links preserve user intent through the entire install flow, solving the common problem of users landing on generic home screens after downloading your app.
Key Takeaways
- iOS uses probabilistic matching (no install referrer like Android)
- SDK handles fingerprinting via UIDevice, Locale, and UIScreen signals automatically
- Navigation gate must wait for both SDK and auth without re-firing
- Default matching score is 850 with 15-minute time window (both customizable)
- Short links condense long parameter strings into clean, shareable hashes
The guide provides production-ready SwiftUI code for handling the full deferred deep linking flow, from cold start through auth gates to final navigation, with clipboard matching as the most valuable optional signal for iOS.
About This Article
iOS apps don't get install referrer data the way Android does. Developers have to figure out where users came from by looking at device signals after the app is already installed. This means using probabilistic matching instead of just looking up the attribution directly.
Detour's iOS SDK pulls fingerprinting signals from UIDevice, Locale, and UIScreen without needing external dependencies. It then scores matches against a threshold you can set yourself, with a default of 850, and does this within a 15-minute window that you can adjust.
Developers can now send users to specific in-app content when they open the app for the first time by matching device signals after installation. This solves the problem of everyone landing on a generic home screen, which used to break the onboarding experience.