Apart from being a tool for voice and text communications, modern mobile phones, or smartphones, have multiple functions. In addition, they contain a variety of useful sensors, such as a camera, barometer, ac celerometer, and a digital compass. The smartphone camera has not received the same level of attention as other types of sensors. By examining the hardware and software aspects of smartphones and highlighting potential applications for the camera to enhance daily activities, this study tries to close the gap. Using guided phrases, a straightforward search of the research publications included in the Google Scholar index was carried out. The papers were chosen based on how well they matched the study's research questions. We reviewed and analysed only pertinent papers. According to the analysis's findings, smartphones' cameras are being used for purposes other than only taking photos for personal and social media. As a result, smartphone cameras are used in applications (apps) that include barcode scanners, document digitising tools, augmented reality, translation tools, and indoor location systems. Users gain from and are assisted by these apps in their daily tasks.