In some examples, a method includes receiving, first notification data from a first application and second notification data from a second application. The method may include generating, based at least in part on comparing the first notification data to the second notification data, an affinity score that indicates whether content from the first notification data has a relationship to at least a portion of content from the second notification data. The method may include, generating a bundle notification graphical element that includes at least a portion of the content from the first notification data and a graphical indicator that indicates the content from the first and second notification data are related. The method may include outputting a set of notification graphical elements comprising the bundle notification graphical element accompanied by the graphical indicator.