This was asked of me so why not
  1. An app that tells you how long a wait there is at a restaurant
  2. An app that tells you how loud and gives a pie chart of how fun/annoying a bar/club is
  3. An app that gives me money because it likes me
  4. An app that lets you know you are approaching a tedious conversation
  5. An app that teleports you to places you feel like you just need a moment in
  6. An app that could do dishes for you
  7. An app that allowed you to lightly shock strangers on public transportation that are annoying
  8. An app that could disable other apps that your friends are addicted to and are destroying the world
  9. An app that could predict the quality of sex of said proposed hook up