Embodiments of the invention are directed to a system, method, and computer program product for dynamically appending and transforming static activity data transmitted to a user device application. In particular, the invention provides a secure platform for dynamic restructuring and inter-connection of inline activity data. The system first determines that a first user, via a first networked device, has initiated a first electronic activity. The system then constructs and transmits a first static activity data set to a second resource application of the second networked device associated with the second user. The system then alters the transmitted first static activity data set of the first electronic activity, in response to the second user modifying an activity parameter item of the first electronic activity, in situ, prior to finalization authorization processing of the first electronic activity by a recipient system, without requiring initialization of an additional electronic activity.