The uninteresting and dated yet functional FM app is often disliked. Maybe you uninstalled the FM app in error or you completed a factory reset and the FM radio app disappeared from your android headunit and you can't find a replacement.
There is a solution
“When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network and Amazon Associates Program, affiliate advertising programs designed to provide a means for sites to earn advertising fees by advertising and linking to Android-Headunits.com.”