Rupnik and Krisper's paper points out the difference between what they call "the classical mobile applications model [that is] a pull application model, which means that its main characteristic is that mobile application is run on the user's demand.", and contrast it with what they call a "context-aware mobile application model" (we would call it a situational model), in which "applications ... use context to provide relevant information and/or services to the user, where relevancy depends on the user's task."