Remote sensing is the acquisition of information about the earth's surface from a distance, without physical contact. This technology has been used for decades by researchers and faculty students in various fields, including geology, environmental studies, agriculture, and urban planning, to gather data and analyze changes in the environment over time. With the advent of mobile devices like smartphones, remote sensing applications have become more accessible and affordable, allowing for real-time data collection and analysis. Android-based smartphones offer several advantages over traditional remote sensing technologies, including high-resolution cameras, GPS capabilities, and powerful computing capabilities. This makes them an excellent tool for researchers and faculty students who need to collect and analyze data quickly and efficiently. For example, a geologist can use a smartphone to capture high-resolution images of rock formations or geological features, which can then be analyzed using software to identify patterns and trends. Another important application of remote sensing on mobile devices is in the field of environmental studies. With the help of specialized apps, researchers can use their smartphones to track changes in temperature, air quality, and other environmental factors in real-time. This data can be used to study the impact of human activities on the environment, and to identify areas that are most vulnerable to climate change. Agriculture is another field where remote sensing on mobile devices can be useful. Farmers can use their smartphones to take pictures of their crops, which can then be analyzed using specialized software to identify pests, diseases, or other issues that may affect crop yields. This can help farmers take proactive measures to prevent crop damage and improve their yields. Urban planners and architects can also benefit from remote sensing applications on mobile devices. By using their smartphones to capture images of buildings and other structures, they can analyze the impact of urban development on the environment, and identify areas where improvements can be made to reduce the impact of human activities on the natural environment. In conclusion, remote sensing applications for mobile devices like smartphones operating on Android offer a range of benefits for researchers and faculty students. By providing real-time data collection and analysis capabilities, these tools can help researchers and students in various fields to gather data quickly and efficiently, and to analyze changes in the environment over time. This can lead to more accurate and effective research findings, and ultimately, better solutions for addressing the environmental challenges facing our planet. The true questions are how far can we go with data acquisition using mobile hand-held devices and which part and how much processing will we be able to do while being offline? And why.