"Identifiers: your IP address, advertising ID, HTTP header, device ID, third-party app IDs (apptoken), country and city level location data and device information (such as model, brand, language, and operating system). Mobile measurement partners: we receive information from third parties to allow us to track performance of our marketing campaigns and to detect fraud in such campaigns. This includes advertising ID, IP address, location, and transaction information."
The app collects a wide range of device identifiers including advertising IDs, device IDs, HTTP headers, and third-party app tokens, which goes beyond what's needed for core game functionality.