% git clone https://github.com/shokai/now.git
% now home
% now
home
% now 'home?'
home ## exit status == 0
% now office
% now
office
% now 'home?'
home ## exit status == 1
with pipe and crontab
0 * * * * now 'home?' && say '家にいます' > /dev/null 2>&1
0 * * * * now 'home?' || (say '家にいません') > /dev/null 2>&1