Proximeter: Empirical Investigation of User Proximity to Their Smartphones

Researchers in ubiquitous computing fields have assumed that smartphone owners consistently use, carry, or have access to their phones throughout the day. Current applications in fields such as mHealth believe that the smartphone is a promising and reliable sensing platform to understand user behaviors and environment. However, as wearable technology (e.g., smartwatches) has become more widely adopted, the changed technology landscape has impacted users' proximity to their smartphone. By introducing new research techniques, we investigate the current users' proximity to their smartphone.