A lifelog is a personal record of one's daily life in a varying amount of detail, for a variety of purposes. The record contains a comprehensive dataset of a human's activities. The data could be used to increase knowledge about how people live their lives. In recent years, some lifelog data has been automatically captured by wearable technology or mobile devices. People who keep lifelogs about themselves are known as lifeloggers.
Evolution of lifelogging apparatus, including the wearable computer, camera, and viewfinder with wireless Internet connection. Early apparatus used separate transmitting and receiving antennas. Later apparatus evolved toward the appearance of ordinary eyeglasses in the late 1980s and early 1990s.
Evolution of the lifelogging lanyard camera. From left to right: Mann (1998); Microsoft (2004); Mann, Fung, Lo (2006); Memoto (2013)
A wearable computer, also known as a body-borne computer, is a computing device worn on the body. The definition of 'wearable computer' may be narrow or broad, extending to smartphones or even ordinary wristwatches.
Smartwatches are an example of a wearable computer.
Smartphones and smartwatches
Evolution of Steve Mann's WearComp wearable computer from backpack based systems of the 1980s to his current covert systems
Timex Datalink USB Dress edition with Invasion video game. The watch crown (icontrol) can be used to move the defender left to right and the fire control is the Start/Split button on the lower side of the face of the watch at 6 o' clock.