# iOS developer API references

> Review the iOS API for Unity Ads SDK integration, deprecated iOS APIs, and the API deprecation policy.

Review the iOS API for Unity Ads SDK integration, deprecated iOS APIs, and the API deprecation policy.

[Unity Ads iOS SDK API reference](/ads-ios/4.18.0/sdk-integration/api/ios-api.md): Use the Unity Ads iOS SDK API to integrate Unity Ads into your iOS apps.
[iOS deprecated APIs](/ads-ios/4.18.0/sdk-integration/api/ios-deprecated-apis.md): Identify deprecated Unity Ads SDK classes for iOS, as well as the replacement and removal versions.
[Unity Ads API deprecation policy](/ads-ios/4.18.0/sdk-integration/api/api-deprecation-policy.md): Review Unity's guidelines on API deprecation. Check timelines, notifications, and exceptions for SDK changes.