Technology is disclosed for providing configurable synchronization mechanisms for automatic synchronization of application states across multiple devices using cloud storage. In accordance with the techniques introduced here, a method includes steps of receiving a request for supplemental application synchronization information associated with a first application on a first remote computing device. In response the request for the supplemental application synchronization information, application-specific configuration information is determined for synchronizing a state of the first application to a cloud-based storage service. The supplemental application synchronization information including the application-specific configuration information is then provided to the first remote computing device for facilitating synchronization of the state of the first application to the cloud-based storage service.