Mobile app stores lack the necessary mechanisms to prevent such scams, researchers from Kaspersky Lab said
You can't buy a phone from Google Play with PayPal, but you can use the email-centric payment method to buy apps.
Enhanced features will soon be available to developers using Google's APIs.
Google will reportedly push stock Android with paid incentives for phone makers and unique features for users.
Google has a new advertising program that lets advertisers target you based on the apps you use, how often you use them, and the types of in-app purchases you make.
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.