The purpose of labelling, tagging or annotating sensor data is often to identify the correct event, stimulus or cause associated with a corresponding sequence of sensor data. Such labels are useful for data analysis algorithms. Therefore, we have developed a mobile application as part of the Wiki-Health platform to help users collect and tag sensor data from smartphones. The application can also be used to trigger alerts and interact with feedback from the Wiki-Health through the platform API.
Details of the Wiki-Health platform can be found: http://www.wiki-health.org