There was a time when booking a cab in India meant calling a radio-taxi company, a service that dispatched metered cabs through a call centre, and waiting for a car to arrive. Meru had built a business around that promise. Get an air-conditioned, metered cab, a trained driver and the comfort of knowing who was coming to pick you up. Mega Cabs and other radio-taxi operators were part of the same early wave.
Then the smartphone changed the rules.