Abstract: Migration functionality is described herein for efficiently migrating application state information among user devices. The migration functionality operates by receiving factor information that describes a context in which a user is using an application on a first user device. For instance, the factor information may describe the manner in which the user has used the application on various user devices on prior occasions, together with characteristics of the user's current environment. The migration functionality then determines, based on the factor information, whether to transfer application state information from the first user device to at least a second user device. The application state information captures at least a dynamic runtime state of the application on the first user device.