Systems, methods, and portable devices for updating user information

A portable device, comprising:

• circuitry configured to:
• generate motion data of the portable device;
• receive from at least one communication device, time-stamped location data of the portable device, based on the generated motion data;
• generate time synchronized user data based on the time-stamped location data and device data of the portable device;
• and
• transmit the time synchronized user data to a server device for update of user information.

A method for updating user information, comprising:

• generating by a first device, motion data of the first device;
• receiving by the first device, time-stamped location data of the first device based on the generated motion data, from at least one communication device;
• generating by the first device, time synchronized user data, based on the time-stamped location data and device data of the first device;
• and
• updating by a second device, the user information based on the time synchronized user data.