Insights can analyze an app to see how fields are used to create charts. The QlikPrecedents Service analyzes apps whenever Insights is opened in the app. The service examines the use of data fields and master items in charts. This teaches Insights precedents for making aggregations, dimensions, and measures for the data model of the app. In unpublished apps, Insights can use precedents learned from published apps and from user feedback in the app.
App analysis does not examine the data in fields, only the data tables and field names and how they are used. App analysis is enabled for all published apps with Insights. You can disable Insights in a published app if you do not want Insights to learn precedents from that app.