The Google Play Sound Search widget can help you recognize music and songs playing around you. You can:

-Identify songs, directly from your homescreen
-Purchase identified songs straight from Google Play, and add them to your Play Music library
-Keep a song identification history, synced across all of your Android devices, so you can purchase a song later
-Add the widget directly to your lockscreen, so you can recognize songs even faster (for devices running Android 4.2)

After you’ve installed the Google Play Sound Search widget, go to the widget picker and drag the Sound Search widget onto your homescreen. Click on the widget to start recognizing.

From version Sound Search 1.2.0:

First Play store release.

Variant
Arch
Version
DPI
(arm-v7a)
Latest: 1.1.12 on February 18, 2015
(noarch)
Latest: 1.2.0 on October 13, 2015
All versions
Sound Search 1.2.0
October 13, 2015

Version:1.2.0

Uploaded:October 13, 2015 at 3:40PM UTC

File size:0.08 MB

Downloads:34,850

Sound Search 1.1.12
February 18, 2015

Version:1.1.12

Uploaded:February 18, 2015 at 9:04PM UTC

File size:0.82 MB

Downloads:20,663

Sound Search 1.1.8
October 2, 2014

Version:1.1.8

Uploaded:October 2, 2014 at 8:20PM UTC

File size:0.64 MB

Downloads:5,015

Sound Search 1.1.7
October 1, 2014

Version:1.1.7

Uploaded:October 1, 2014 at 8:20PM UTC

File size:0.44 MB

Downloads:8