diff --git a/project/ui/app.slint b/project/ui/app.slint
new file mode 100644
index 0000000..0bb5e5a
--- /dev/null
+++ b/project/ui/app.slint
@@ -0,0 +1,21 @@
+import { Button, VerticalBox, HorizontalBox } from "std-widgets.slint";
+
+export component Prorater inherits Window {
+    title: "Auto Spa Express - Prorater";
+    width: 1024px;
+    height: 720px;
+
+    VerticalBox {
+        Image {
+            source: @image-url("../data/logo.png");
+            width: 25%;
+            height: 25%;
+        }
+
+        Text {
+            text: "Auto Spa Express - Prorate Tool";
+            font-size: 4rem;
+            horizontal-alignment: center;
+        }
+    }
+}