Mobile devices, such as smart phones and tablets have become widely popular as an access to the internet and an easier approach to deal with and share real-time digital information. Mobile devices are in general consisted of the integral design and fabrication of optical, electronic, mechanical and MEMS sensors. Expanding the utilities of such sensors to perform easier instrumentation and measurement can be achieved by adding internal programs, commonly known as applications or apps in the device or additional external sensing facilities. The prevalence of mobile devices lately has made it an emerging yet indispensible fraction and has created a strong niche for the future of instrumentation and measurement. In this paper, we investigate several examples of how mobile devices perform measurement and monitoring in real life situations.