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Sometimes, your friends may send to you a part of a song in What's app, and if you like it, you can't download it because you don't know its name. This is why I suggest a very nice website that can provide the name of any song. 

First, you need a microphone and a loudspeaker, if you have the song's part in your phone then you don't need the loudspeaker.

Go to the website from the link above, then click on "Click and Sing or Hum", if a pop-up appears just click on "Authorize" to start recording. After that start the song's part on your phone or computer, after 10 seconds click on the magnifier icon to show up the results.