You always have to take these figures with a pinch of salt when a company has a vested interest in the outcome, but according to Lookout, a mobile company that builds both free and paid security
apps for iPhone and Android
devices, over a million Android users downloaded some form of adware
in the past year. Lookout says adware is one of the most prevalent threats on mobile worldwide, and it's especially a problem for Android.
Even if an Android user only downloads apps from Google Play
, they could become infected with adware. Lookout estimates that 6.5 percent of free apps on Google Play contain adware, finding that it's most prevalent in personalization (26 percent), racing (23 percent), and sports games (18 percent) application categories.
In addition, Lookout says the global likelihood of a new Android Lookout user having adware on their device is 1.6 percent, which is relatively higher than other mobile threats, and 0.9 percent in the U.S.
What exactly constitutes adware in the first place? There really isn't a widely adopted set of guidelines, but as far as Lookout is concerned, adware is "an ad network that exhibits one or more of the following intrusive behaviors without requesting appropriate user consent: display advertising outside of the normal app experience, harvest unusual personally identifiable information, or perform unexpected actions as a response to ad clicks."