diff --git a/lib/app_sources/fdroidrepo.dart b/lib/app_sources/fdroidrepo.dart
index 2872459..a1eb51a 100644
--- a/lib/app_sources/fdroidrepo.dart
+++ b/lib/app_sources/fdroidrepo.dart
@@ -86,6 +86,27 @@ class FDroidRepo extends AppSource {
     }
   }
 
+  @override
+  void runOnAddAppInputChange(String userInput) {
+    this.additionalSourceAppSpecificSettingFormItems =
+        this.additionalSourceAppSpecificSettingFormItems.map((row) {
+      row = row.map((item) {
+        if (item.key == 'appIdOrName') {
+          try {
+            var appId = Uri.parse(userInput).queryParameters['appId'];
+            if (appId != null && item is GeneratedFormTextField) {
+              item.required = false;
+            }
+          } catch (e) {
+            //
+          }
+        }
+        return item;
+      }).toList();
+      return row;
+    }).toList();
+  }
+
   @override
   App endOfGetAppChanges(App app) {
     var uri = Uri.parse(app.url);
diff --git a/lib/pages/add_app.dart b/lib/pages/add_app.dart
index 3da2829..1b35f79 100644
--- a/lib/pages/add_app.dart
+++ b/lib/pages/add_app.dart
@@ -71,6 +71,7 @@ class AddAppPageState extends State<AddAppPage> {
         if (pickedSource.runtimeType != source.runtimeType ||
             (prevHost != null && prevHost != source?.hosts[0])) {
           pickedSource = source;
+          pickedSource?.runOnAddAppInputChange(userInput);
           additionalSettings = source != null
               ? getDefaultValuesFromFormItems(
                   source.combinedAppSpecificSettingFormItems)
diff --git a/lib/providers/source_provider.dart b/lib/providers/source_provider.dart
index fded867..9de017f 100644
--- a/lib/providers/source_provider.dart
+++ b/lib/providers/source_provider.dart
@@ -463,6 +463,10 @@ abstract class AppSource {
     }
   }
 
+  void runOnAddAppInputChange(String inputUrl) {
+    //
+  }
+
   String sourceSpecificStandardizeURL(String url) {
     throw NotImplementedError();
   }