Ad fraud is twice as high on Android devices as it is on iOS smartphones and tables, according to a recent report by Datavisor. The report, which studied 140 million app installs across almost 500 ad networks and publishers, says that average app install ad fraud on Android is 5.8%, while on iOS it is 3%. I've studied mobile ad fraud extensively, and I've estimated the size of the global market at north of $10 billion in 2017, and possibly as high as $15 billion. App install fraud occurs when fraudsters fake app installs, falsely claim credit for legitimate app installs, or use malicious apps to download real apps onto real users' devices without their knowledge. "Android devices are popular among fraudsters due to the easier-to-hack open platform and the proliferation of diverse low-cost models."

Source: Forbes September 21, 2017 21:45 UTC