A method and system for a synchronous event manager for automatic content recognition (ACR) are described. A display device, such as a connected television or mobile device, may be operable to perform ACR and may utilize a synchronous event manager comprising a software layer that may continuously be executed as a background process. The software layer may comprise a single framework or framework from which to execute one or more user-interaction applications. The software layer may monitor internal and external events and may detect an event trigger produced in response to a match resulting from the ACR. After receiving a user-interaction application corresponding to the detected event trigger, the software layer may launch or invoke the user-interaction application from the single framework. In some instances, multiple user-interaction applications may be launched concurrently from the single framework. These user-interaction applications may interface with each other through the single framework.