I am talking about detecting FM radio station on my mobile device.I want my mobile device to be able to catch the radio station. What about sound radio detectio

I am talking about detecting FM radio station on my mobile device.I want my mobile device to be able to catch the radio station. What about sound radio detection (does not have to be frequency detection)? Is it more obviously? All I need is an algorithm for radio station detection. Thank you for your answer. I will check Android FM receivers.