# Android developer API references

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

Review the Kotlin and Java API for Unity Ads SDK integration, deprecated Android APIs, and the API deprecation policy.

[Unity Ads Android SDK API reference - Kotlin and Java](/ads-android/4.19.0/sdk-integration/api/android-api.md): Use the Unity Ads Android SDK API in Java and Kotlin to integrate Unity Ads into your Android apps.
[Android deprecated APIs](/ads-android/4.19.0/sdk-integration/api/android-deprecated-apis.md): Identify deprecated Unity Ads SDK classes for Android, as well as the replacement and removal versions.
[Unity Ads API deprecation policy](/ads-android/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.