The present teaching relates to creating and updating a user profile related to multiple devices, and synchronizing applications' sessions for the user on different devices. Upon execution of a first application on a first device, a first device ID associated with the first device and information about the first application are received. A user profile is created based on the first device ID and the information about the first application. Upon execution of a second application on a second device related to the first device, a second device ID associated with the second device and information about the second application are received. The user profile is updated based on the second device ID and the information about the second application. Further, the information about the first application is applied to the execution of the second application on the second device, or vice-versa.