‘Quitting smoking is easy,” said Mark Twain. “I’ve done it hundreds of times.” Much the same goes for smartphones. As increasing numbers of people begin to realise that they have a smartphone habit they begin to wonder if they should do something about the addiction. A few (a very few, in my experience) make the attempt, switching their phones off after work, say, and not rebooting them until the following morning. But almost invariably the dash for freedom fails and the chastened fugitive returns to the connected world.