“What's the magic word?” When I was growing up, this phrase was to beg the answer: “Please”, a staple of the superficially terribly polite manners that lubricate day to day life in the UK. And, of course, it is magical, in the sense that it is transformative. A question which contains the word please is often very differently from one that lacks it. There are other magic words. As a minor hobby I look out for them. There's one that's been around for a while now— “YesButNotInFrontOfTheChildren” which is now the only non—“no” answer to the question “Do you smoke?” I'd like to propose here that the word “app” is another of those magical words. I see people who normally have quite astute critical faculties rendered unconditionally joyful by content, provided it …