In this paper we have identified and analysed important accessibility issues typical for the world of mobile devices and we have compared them with common sets of accessibility guidelines. We have filled the gap we have identified, by means implementation of simulation tool that provides mobile application developers convenient way how to simulate these issues with any mobile platform. It is developed as a transparent layer that can be placed over the mobile platform simulator and provides effects such as reflection, finger occlusion, tremor or simulation of visual impairments like tunnel vision, blurred vision or colour blindness.