# iOS developer API references

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

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

[Unity Ads iOS SDK API reference - Swift](/ads-ios/4.19.0/sdk-integration/api/ios-api-swift.md): Use the Unity Ads iOS SDK API in Swift to integrate Unity Ads into your iOS apps.
[Unity Ads iOS SDK API reference - Objective-C](/ads-ios/4.19.0/sdk-integration/api/ios-api-objc.md): Use the Unity Ads iOS SDK API in Objective-C to integrate Unity Ads into your iOS apps.
[iOS deprecated APIs](/ads-ios/4.19.0/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/4.19.0/sdk-integration/api/api-deprecation-policy.md): Review Unity's guidelines on API deprecation. Check timelines, notifications, and exceptions for SDK changes.