In my personal view that Train services is going to expand tremendously in future. As far as ticketing apps are concerned, everyapp gets their income in many ways say booking, cancellation etc. IRCTC app due to huge members working slow and these apps do good. So oboviously these apps will get good business in the years to come . better to subscribe for medium term.
i invested in NCD of Edelweiss couple of years back in thier group issue. i am regularly getting the interest properly. there is no problem. i personally recommend.