Table 1 Details of the collected data

Call

Type (outgoing, incoming), duration, name of the person, time

SMS

Type (sent, received), receiver/sender name, length of SMS message, time

App usage

App name, package name, duration, time

Music

Track name, artist, album, duration, time

Physical activity

Type (walking, running, in vehicle, on bicycle), confidence level, duration, time

Battery charging

Type of power connection (AC, USB), duration, time

Location

Latitude, longitude, duration, time, accuracy (i.e., the expected error bound)