“…To date, studies on prototype and commercial GPS devices in dementia care have used different product types with similar functions and design features. Typically, products are small (e.g., pager sized or watch sized), discrete or nonvisible (e.g., worn around the waist, neck, wrist, or placed inside a pocket or shoe sole), have two to six main functions (e.g., location, telephone, geofencing, alarm, fall detection, and speed alert), no buttons (i.e., passive systems) or one to three buttons (i.e., active systems), and are lightweight [5] , [6] , [7] , [8] , [9] , [10] , [11] . These functions and features are in line with most expert recommendations [7] , [12] .…”