Battery Drains

I used to be a big fan of "Desi Radio"... But not anymore. Somehow from past 1 week my iPhone battery drains when Desi Radio is on. Proportion of battery used is VERY HIGH though app is playing in background...
I couldnt see any recent reviews complaining about battery drain.. I wonder if that is happening only for my phone.

Chanti02 about Desi Radio - Indian Stations, v4.2