Wearable and snappable sensing devices may act to sense data associated with an environment of the user. A mobile device and the wearable/snappable device may together operate to provide an application for sensing environmental data associated with the user, analyzing the environmental data, and providing reports to the user. In one implementation, a mobile device may connect to an external sensing device; receiving, from the sensing device, environmental data sensed by the sensing device; provide, over a wide area network, a classification query to a remote classification service, the classification query being based on the sensed data; receive, from the classification server, classification results in response to the classification query; and provide, via a graphical display of the mobile computing device, a report based on the classification results.