There are loads of journey planner apps out there, but none that were good for the indian metro trains.
So I decided to write one, here is the link : https://market.android.com/details?id=com.jainpraz.apps.travel.metro.ind
Some things that I have added in this app, which are missing from other similar apps for Indian market are : ability to find shortest route from source to destination, intuitive user interface.
The user interface is much easy to use.
Try it out.
Of course feedback is welcome.
but if there is something urgent you will like to address soon then do drop me a line.
Currently supports Bangalore and New Delhi metros.