diff --git a/Examples/xx-messenger/Sources/AppCore/SharedUI/Data+hexString.swift b/Examples/xx-messenger/Sources/AppCore/SharedUI/Data+hexString.swift
new file mode 100644
index 0000000000000000000000000000000000000000..05755e40e15284435c81514b5edf08eb49814ef8
--- /dev/null
+++ b/Examples/xx-messenger/Sources/AppCore/SharedUI/Data+hexString.swift
@@ -0,0 +1,7 @@
+import Foundation
+
+extension Data {
+  public var hexString: String {
+    map { String(format: "%02hhx ", $0) }.joined()
+  }
+}
diff --git a/Examples/xx-messenger/Sources/ContactFeature/ContactView.swift b/Examples/xx-messenger/Sources/ContactFeature/ContactView.swift
index a96111402f7d34065fc8aa704c838b3a44faab64..b8ab18a77edd7c45add3926c4ad50a28ab391989 100644
--- a/Examples/xx-messenger/Sources/ContactFeature/ContactView.swift
+++ b/Examples/xx-messenger/Sources/ContactFeature/ContactView.swift
@@ -108,6 +108,8 @@ public struct ContactView: View {
 
         if let dbContact = viewStore.dbContact {
           Section {
+            Label(dbContact.id.hexString, systemImage: "number")
+              .font(.footnote.monospaced())
             Label(dbContact.username ?? "", systemImage: "person")
             Label(dbContact.email ?? "", systemImage: "envelope")
             Label(dbContact.phone ?? "", systemImage: "phone")