Best app and the only one I use

So I have tried several of these apps but this is the only one that worked. It lets you pick any of your songs and even lets you pick certain sections of it. It was a little hard to learn how to use it since the directions didnt work. I found out how from another app that would transfer my music but the directions worked for this one.
I have an iPhone 6s. And it works perfect

Download the song
Plug in iPhone
Go to apps
Scroll down to the bottom on page
Click this app in the second bottom left section
Drag the tunes to desktop
Open in iTunes
Go to phone icon
Click tunes
Pick all
And sync

Llamperouge3 about Ringtone Maker - Make free ringtones from your music!, v2.2