Client device application interaction monitoring

Systems and methods herein allow for automatic monitoring of conversions associated with uniform resource identifiers (URIs) accessed via client applications but actuated on web browsers. Upon actuation of a URI on a browser of a client device, a data processing system can assign a click ID to the actuation event and send it to the client device. The client device can open the URI in a client application and send the click ID and a client ID associated with the client device to the client device. The data processing system can map the click ID to the client ID. Upon occurrence of a URI related conversion, on the client application, the data processing system can receive a conversion message indicative of the conversion and including the client ID, and link the URI related conversion to the click ID based on the stored mapping.