diff --git a/docs/Engineering_Reference_Manual.md b/docs/Engineering_Reference_Manual.md
index 0ef872c1..36ccb6cf 100644
--- a/docs/Engineering_Reference_Manual.md
+++ b/docs/Engineering_Reference_Manual.md
@@ -56,7 +56,7 @@ Closer is a couples relationship app. The product goal is **private, mutual-reve
 | Platform | Stack | Role |
 | --- | --- | --- |
 | Android | Kotlin, Jetpack Compose, Material 3, Hilt, Room, DataStore | Reference implementation; owns the E2EE crypto layer |
-| iOS | SwiftUI, MVVM, async/await, Firebase iOS SDK, RevenueCat | Screen parity with Android; E2EE cross-compatibility not yet implemented |
+| iOS | SwiftUI, MVVM, async/await, Firebase iOS SDK, RevenueCat | Screen parity with Android; E2EE cross-compatibility code-complete for schemaVersion 2 (couple-key) - see [iOS E2EE gap](#ios-e2ee-gap-status-as-of-current-batch) |
 | Backend | Firebase Auth, Firestore, Cloud Functions (TypeScript), FCM, App Check | Shared source of truth for both apps |
 
 ### Data ownership