A very Japanese app

Answering nature's call with a smartphone 

Users of Japan’s first smartphone-controlled toilet can simply touch their screens to flush, adjust bidet functions, change seat temperatures and even keep a “diary” of all those relaxing moments.

Housing equipment manufacturer Lixil Corp. said it developed the toilet after learning that an increasing number of people take their smartphones with them to the bathroom.
 .....
“It is popular among those who want to relax in their bathrooms,” said a Lixil public relations official. “It has also received positive responses thanks to its built-in speaker to play music downloaded into smartphones.”

The new toilet is remotely controlled through application software.
Users first register their favorite position of the water spray, water temperature and other settings in advance. When they enter the bathroom, their smartphones automatically relay the information to the toilet to change the settings.

That eliminates the troublesome task of manually changing the configuration set by family members and other people who share the same bathroom.