With the widespread availability of cheap but powerful mobile devices and high-speed mobile Internet, we are witnessing an unprecedented growth in the number of mobile applications (apps). In this paper, we present a systematic review of mobile apps which use Semantic Web technologies. We analyzed more than 400 papers from proceedings of important conferences on Semantic Web and other venues. We give a brief overview of the 36 semantic mobile apps we identified by grouping them based on their specific functionalities. Our results show that usage of Semantic Web technologies on mobile devices is on the rise and there is a need for development of more tools to facilitate this growth.