Elizabeth I of England received a wristwatch from Robert Dudley in 1571. That was the first wristwatch.
Wristwatches are worn by military men towards the end of 19th century.
Mechanical watches were used since wristwatches first appeared to 1970.
The disadvantage of mechanical wristwatch is that there can be several seconds error per day.
Electric watches first appeared in 1967 and soon replaced mechanic watches.
Smartwatches was invented first by Pebble in 2012.
The most recent released smart watch was apple watch series 2 released in 2016.