diff --git a/content/docs/ios/changelog.mdx b/content/docs/ios/changelog.mdx
index b21c603..31186bb 100644
--- a/content/docs/ios/changelog.mdx
+++ b/content/docs/ios/changelog.mdx
@@ -7,6 +7,16 @@ description: "Release notes for the Superwall iOS SDK"
 
 The changelog for `SuperwallKit`. Also see the [releases](https://github.com/superwall/Superwall-iOS/releases) on GitHub.
 
+## 4.16.1
+
+### Enhancements
+
+- Clarifies that `IntegrationAttribute.onesignalId` should be set to the OneSignal User ID used by the OneSignal integration.
+
+### Fixes
+
+- Makes sure that the compiler directive is correct for billing plan types so that the SDK builds in Xcode version 26.4.
+
 ## 4.16.0
 
 ### Enhancements
diff --git a/content/docs/ios/index.mdx b/content/docs/ios/index.mdx
index 094bc43..c5d85b6 100644
--- a/content/docs/ios/index.mdx
+++ b/content/docs/ios/index.mdx
@@ -135,6 +135,6 @@ If you have feedback on any of our docs, please leave a rating and message at th
 If you have any issues with the SDK, please [open an issue on GitHub](https://github.com/superwall/superwall-ios/issues).
 
 <SdkLatestVersion
-  version="4.15.4"
+  version="4.16.1"
   repoUrl="https://github.com/superwall/Superwall-iOS"
 />
diff --git a/content/docs/ios/sdk-reference/index.mdx b/content/docs/ios/sdk-reference/index.mdx
index 6f06ac4..273bfb5 100644
--- a/content/docs/ios/sdk-reference/index.mdx
+++ b/content/docs/ios/sdk-reference/index.mdx
@@ -101,6 +101,6 @@ If you have feedback on any of our docs, please leave a rating and message at th
 If you have any issues with the SDK, please [open an issue on GitHub](https://github.com/superwall/superwall-ios/issues).
 
 <SdkLatestVersion
-  version="4.15.4"
+  version="4.16.1"
   repoUrl="https://github.com/superwall/Superwall-iOS"
 />
diff --git a/content/docs/ios/sdk-reference/setIntegrationAttributes.mdx b/content/docs/ios/sdk-reference/setIntegrationAttributes.mdx
index f5b4fe3..9fbeba4 100644
--- a/content/docs/ios/sdk-reference/setIntegrationAttributes.mdx
+++ b/content/docs/ios/sdk-reference/setIntegrationAttributes.mdx
@@ -124,6 +124,7 @@ Superwall.shared.setIntegrationAttributes([
   .amplitudeUserId: "user123",
   .mixpanelDistinctId: "distinct456",
   .firebaseInstallationId: "abc123",
+  .onesignalId: "onesignal-user-id",
   .custom("myCustomKey"): "customValue"
 ])
 ```
@@ -149,6 +150,7 @@ Common integration attributes include:
 - `.firebaseInstallationId` - Firebase installation ID (4.10.8+)
 - `.appstackId` - Appstack identifier (4.12.11+)
 - `.singularDeviceId` - Singular device identifier (SDID) (4.15.4+)
+- `.onesignalId` - OneSignal User ID (`onesignal_id`) for the user. Do not use the legacy OneSignal Player ID.
 - `.custom(String)` - Custom attribute key
 
 ## Related