App Links are Android's equivalent of Apple's Universal Links, allowing verified HTTPS URLs to open directly in a native Android app. When a user taps a verified App Link, the system launches the app immediately without showing a disambiguation dialog, providing a seamless transition from web to app.
App Links work through Digital Asset Links, a JSON file hosted at /.well-known/assetlinks.json on the web domain. This file declares the relationship between the website and the Android app, including the app's package name and signing certificate fingerprint. Android verifies this relationship at app install time and uses it to route matching URLs directly to the app. Android development books on Amazon cover the setup process.
The key difference between App Links and traditional Android intent filters is verification. Without verification, Android shows a chooser dialog asking the user which app should handle the URL. With App Links verification, the system automatically opens the designated app, eliminating user friction.
For URL shortening services, supporting App Links means hosting the assetlinks.json file on the short URL domain and coordinating with app developers to configure their intent filters correctly. Cross-platform development books on Amazon discuss multi-platform deep linking strategies.