Deep Links: The Complete Guide

What are deep links?

Deep links are URLs that open a specific in-app destination (e.g., a product page) rather than the generic home screen. With SDDL you can create branded links, handle install flows (deferred deep links), and preserve context for routing.

Types of deep links

• Universal Links (iOS): HTTPS links handled by your iOS app.
• App Links (Android): HTTPS links verified to open your Android app.
• Custom URL Schemes: e.g., myapp://product/123 (fallbacks required; use with care).
• Deferred deep links: preserve context across install and route after first launch.

Benefits

• Higher conversion and smoother onboarding.
• Better attribution and campaign measurement.
• Personalized routing and re-engagement.

iOS (Universal Links)

Enable Associated Domains and add:

applinks:{YOUR_ID}.sddl.me
applinks:{your.custom.domain}

You don’t host apple-app-site-association yourself — SDDL publishes it automatically from your settings.

SwiftUI (official SDDL iOS SDK)

import SwiftUI
import SDDLSDK

struct ContentView: View {
    var body: some View {
        Color.clear
            .onOpenURL { url in
                SDDLHelper.resolve(url, onSuccess: handlePayload(_:), onError: handleError(_:))
            }
            .onContinueUserActivity(NSUserActivityTypeBrowsingWeb) { activity in
                SDDLHelper.resolve(activity.webpageURL, onSuccess: handlePayload(_:), onError: handleError(_:))
            }
            .onAppear {
                SDDLHelper.resolve(nil, onSuccess: handlePayload(_:), onError: handleError(_:))
            }
    }
}

Android (App Links)

SDDL publishes assetlinks.json automatically from your package name and SHA256 fingerprints.

// settings.gradle.kts
pluginManagement {
    repositories {
        gradlePluginPortal()
        google()
        mavenCentral()
        maven("https://jitpack.io")
    }
}

// app/build.gradle.kts
dependencies {
    implementation("com.github.nonanerz:sddl-android-sdk:2.0.9")
}

Declare App Links in your manifest with android:autoVerify="true".

FAQ