But the company's bread-and-butter remains ads as it brought in $15.42 billion in revenue during the first three months of 2014, up 19 percent from the year-ago quarter.
Google recently pulled a $4 security app from Google Play that bilked thousands of users before it was finally found out.
Google makes developers responsible for keeping scammy stuff like simulated system alerts and sudden redirects out of their apps. The company also sets curbs on pornography.
Where's My Droid and Speed Night were cited as the most downloaded malicious apps.
Analysis finds that Google Play still battles apps bearing malware, but the estimates vary with the research.