diff --git a/.changeset/shaggy-shirts-rule.md b/.changeset/shaggy-shirts-rule.md
new file mode 100644
index 00000000..f4f9418d
--- /dev/null
+++ b/.changeset/shaggy-shirts-rule.md
@@ -0,0 +1,5 @@
+---
+"nxjs-runtime": patch
+---
+
+Make `Application#id` return the "PresenceGroupId" instead of "SaveDataOwnerId"
diff --git a/packages/runtime/src/switch/ns.ts b/packages/runtime/src/switch/ns.ts
index 15884664..d03abf2a 100644
--- a/packages/runtime/src/switch/ns.ts
+++ b/packages/runtime/src/switch/ns.ts
@@ -29,7 +29,7 @@ function _init() {
  */
 export class Application {
 	/**
-	 * The 64-bit unique identifier of the application.
+	 * The 64-bit unique identifier of the application (`PresenceGroupId`).
 	 */
 	declare readonly id: bigint;
 
diff --git a/source/ns.c b/source/ns.c
index 150807e3..baa4da09 100644
--- a/source/ns.c
+++ b/source/ns.c
@@ -102,7 +102,7 @@ static JSValue nx_ns_app_id(JSContext *ctx, JSValueConst this_val, int argc, JSV
 	{
 		return JS_EXCEPTION;
 	}
-	return JS_NewBigUint64(ctx, app->data.nacp.save_data_owner_id);
+	return JS_NewBigUint64(ctx, app->data.nacp.presence_group_id);
 }
 
 static JSValue nx_ns_app_nacp(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv)