diff --git a/packages/apple-signin/README.md b/packages/apple-signin/README.md
index f375217..b701ace 100644
--- a/packages/apple-signin/README.md
+++ b/packages/apple-signin/README.md
@@ -305,6 +305,20 @@ if (Platform.OS === 'ios') {
 - **Credential State**: On iOS, you can check if the user's Apple ID is still authorized via `getCredentialState()`. This is used during token refresh instead of silent re-authentication.
 - **No Client-Side Refresh**: Apple does not support client-side token refresh. When the identity token expires, the user must re-authenticate.
 
+## Platform Notes
+
+### Renewal & Maintenance
+
+- Apple Sign-In **keys do not automatically expire**. Once generated, they remain valid until they are revoked or deleted.
+- Your Services ID is tied to your Apple Developer Program membership, which renews annually. If your membership lapses, Sign in with Apple stops working for all your apps.
+- There are no certificates to rotate specifically for Sign in with Apple (unlike APNs push certificates).
+
+### iOS Version Notes
+
+- Sign in with Apple is available on Apple platforms starting with **iOS 13+**, but this library currently requires **iOS 15.1+** on iOS because its CocoaPods deployment target is set to 15.1.
+- On **iOS 15+**, Apple provides more reliable support for detecting credential state changes (for example, revoked or transferred credentials) via `getCredentialState()`.
+- On native, `AppleSignInButton` is a custom React Native button styled for Sign in with Apple; its appearance is defined by this package rather than by Apple's `ASAuthorizationAppleIDButton`.
+
 ## API Reference
 
 ### Types