https://www.acq.osd.mil/osbp/sbir/solicitations/sbir20032/darpa032.pdf

pg 19

DARPA SB032-036 TITLE: MyDay Personal Data Capture System

TECHNOLOGY AREAS: Information Systems, Human Systems

Approved for Public Release, Distribution Unlimited

OBJECTIVE: Develop a very low cost wearable data capture system to support the "physical" data stream acquisition on a person as they experience their daily life. The physical data stream, as a minimum, includes visual, audio, and geolocation information.

DESCRIPTION: The minimal MyDay Personal Data Capture System version would include a tiny digital camera, microphone, inertial measurement sensors, compass, user interface, processor, several hundred megabytes of memory, Universal Serial Bus (USB) or Firewire interface, and a replaceable battery. Compact packaging is desired perhaps, a lapel pin or headband-mounted (usable with or without a hat) sensor head connected down to a base unit worn on the belt. Ultimately, the separate base unit should be incorporated into a single MyDay system. A global positioning system (GPS) and a better user interface are features that should be elements of an enhanced version. A mass-produced commercial product should sell for less than $200. This is NOT a "wearable computer" in the sense of providing computing resources to the user; it is a data acquisition system.

That sounds like a smartphone to me