It’s nearly midnight, the air is autumnal in Delhi, there is only a distant thud-thud of an earthmover pounding away for a Metro line, we are both immersed in our books when my wife suddenly says, “I think I will take the dog out for a walk.” I am stumped. “But he is sleeping soundly,” I mutter. “No, he must be quite looey by now,” she says, and calls the dog, who looks incredulous. She is back in ten minutes, with a triumphant glow. Then I get it. Her 10,000 steps are completed. Her fitness app has sung a song and given her a round of applause.