Although AR-based task prompting systems have been
effective in assisting users with transitioning vocational task
steps independently, the system relies on a large liquid crystal
display, which may not be viable in many workplaces [1, 2].
Furthermore, a large display is unsuitable for delivering task
prompts for mobile users. Smart phones can also be used for
task prompting [3]; however, using a mobile phone while
working with the hands can be bothersome.