The other apps tested were from WebMD and Hotel.com
The Infection rate of Android devices is estimated to be as high as 4 percent and as low as 0.0009 of a percent, depending on the study. On iOS devices the rate is even lower, because Apple vets all apps, which are only available through the App Store.
The most likely scenario for getting malware on an Android device is through a third-party app store, which are common in Eastern Europe and Asia. In the U.S., most Android apps are downloaded from the more secure Google Play store.
A video demonstration of the researchers' malware is available online.
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