Security firm Lookout have a new report which is pretty damning for US-based Android users, where they report that over one million Americans have download adware-infected Android applications, most of them without even knowing so.
Worse than that, is that 6.5% of free applications on the Google Play Store are infected with adware in some form. Lookout have noted that the most prevalent app-based mobile threat in the world today is adware, as it can take user privacy away and take things like personal information such as e-mail, location data and address lists, all without proper notification and modifying phone settings without users' consent.
Adware is a grey area of the market to explain, as there's no defined set of rules of what adware is exactly. What Lookout did instead, was provide some guidelines that they use to differentiate an innocent ad from an adware one. Lookout classify an app that is infected with adware if it displays advertising that's outside of the normal experience, if it contains unusual indentifiable information, or if it performs unexpected actions as a response to ad clicks.