Ad inspector is an in-app overlay that lets you perform real-time analysis of test ad requests directly within a mobile app. For a list of ad inspector features, see [Test your app with ad inspector](https://support.google.com/admob/answer/10159602). > [!WARNING] > **Warning:** Enabling ad inspector increases memory usage of the GMA Next-Gen SDK for test devices. This guide covers how to perform the following: - [Launch ad inspector](https://developers.google.com/admob/android/next-gen/ad-inspector/launch-ad-inspector.md.txt) - [Verify adapter integrations](https://developers.google.com/admob/android/next-gen/ad-inspector/verify-adapter-integrations.md.txt) - [Test ad units](https://developers.google.com/admob/android/next-gen/ad-inspector/test-ad-units.md.txt) - [Troubleshoot ad units](https://developers.google.com/admob/android/next-gen/ad-inspector/troubleshoot-ad-units.md.txt) - [Troubleshoot privacy settings](https://developers.google.com/admob/android/next-gen/ad-inspector/troubleshoot-privacy-settings.md.txt) ### Prerequisites Before you can use ad inspector, you must complete the following tasks: - Create an AdMob account. For more details, see [Sign up for AdMob](https://support.google.com/admob/answer/7356219). - [Set up an app in AdMob](https://support.google.com/admob/answer/9989980). - [Set up GMA Next-Gen SDK](https://developers.google.com/admob/android/next-gen/quick-start.md.txt). - Install GMA Next-Gen SDK version 0.9.0-alpha01 or higher. To view the latest version, see [Release notes](https://developers.google.com/admob/android/next-gen/rel-notes.md.txt). - Add your device as a test device. To add a test device, see [Enable test devices](https://developers.google.com/admob/android/next-gen/test-ads.md.txt#enable_test_devices) > [!IMPORTANT] > **Important:** Ad inspector launches only on *test devices*.