A link to a product page should open the product page, not a browser tab asking the user to install an app they already have. That gap is where deep linking earns its keep: a shared link, a marketing email, a QR code, or a push notification lands the user on exactly the right screen, logged in, with the back stack intact.

Flutter makes the in-app half easy. The part that trips developers up is verification: proving to Android and iOS that your app is allowed to handle your domain. This guide covers the whole chain — Android App Links, iOS Universal Links, custom schemes as a fallback, and the Dart code that turns an incoming URL into a route — with every file you need.

The three kinds of links

Type How it opens When to use it

Custom scheme (myapp://products/42) Always shows a chooser if several apps claim it Internal links, development, fallback

Android App Link ( https://example.com/products/42 ) Opens your app directly, no chooser Production links on Android

iOS Universal Link (…