"Solely with respect to information you agree to share, we use it for Simple promotional purposes. IDFA or Android Advertising ID (whichever is applicable to your device), IDFV, Country, IP address, Age group, Gender, Subscription status, App use information, Device details, Mobile network operator information, User clicks in particular ads. We use AppsFlyer to help us identify you as an existing user when you further use the App."
The app collects advertising IDs (IDFA/Android Ad ID), device fingerprinting data, and uses AppsFlyer to link user identity across website and app, enabling cross-service and cross-device tracking.