Context awareness is a property of mobile devices that is defined complementarily to location awareness. Whereas location may resolve how certain processes around a causal device operate, context may be applied more supplely with mobile users, especially with users of smart devices. As the number of sensors on smart devices continues to raise, these devices can automatically trail data from the user's surroundings, including geo location, time of day, movement, and other sensor data. Making intelligence of this data in an ethical manner that respects the privacy of smart devices users is just one of the many challenges faced by researchers.