India, April 25 -- If things go according to plan, Prime Minister Narendra Modi will launch Mumbai One - a common ticketing app for all modes of public transport in the city - on May 1, when he is here to inaugurate the Waves summit.

The app is currently undergoing beta testing, and an inter-ministry team comprising bureaucrats from Indian Railways, Mumbai Metropolitan Region Development Authority (MMRDA), and various state government departments is busy weeding out bugs and glitches.

Mumbai One will allow nearly 10.5 million users of public transport in the city - encompassing commuters of suburban locals, metro rail, monorail and buses - plan their journeys and purchase tickets on their phones, officials engaged in testing the app tol...