Question: how to make a song from spotify your ringtone on iphone?
Answer: Step 1: Copy Spotify single track URL or playlist URL to the Spotify music converter. ... 
Step 2: Choose output as AAC or MP3. ... 
Step 3: Press convert to wait for the converted song. ... 
Step 1: Connect iPhone to computer via USB cable and select Ringtone Maker on Syncios.