Could it solve gender inequality? Research shows women still do the lion's share of domestic work. The Spanish initiative will use technology to find where men must do more.
Spain launches app to make men do housework
Divide: Researchers say that most women do regular chores, like cleaning, while men do intermittent ones. Glossary
Invisible - Something that cannot be seen.
Expert - Someone who knows a lot about a particular subject.
Iceland - A volcanic island just south of the Arctic Circle. Its parliament, the "Althing", is thought to be the oldest in the world, dating from 930.
Strike - When people refuse to work until their demands for changes have been met.