It can be downloaded from the following links :-

Android: https://play.google.com/store/apps/details?id=com.radio.fmradio
Apple: https://itunes.apple.com/us/app/radio-fm/id951362406
Amazon: http://www.amazon.com/RadioFM-Radio-FM/dp/B00QKB1A02
Website: http://www.radiofm.in