App indexing is becoming more and more important as consumers are becoming more mobile. Rajan Patel covered how they would be handling app indexing. One of the biggest differences between app indexing and web indexing is that app indexing will be using the App Indexing API while web indexing uses PageRank. The API is capable of measuring time spent on certain areas of your app. Google also has a crawler that will be crawling through apps similarly to how they crawl through websites. The new API works for both iOS and Android.