Android users searching for WhatsApp on Google Play saw a fake copy of the app above the real one. The fake app appeared in a paid "sponsored" spot at the top of the search results.
The fake listing used the same name, icon, screenshots, and text as the real WhatsApp. Because it looked like the genuine app, people downloaded it more than 500,000 times. However, the real WhatsApp has over 10 billion downloads and an "editor's choice" badge.
Users could not leave public reviews to warn other people about the copy. The developer may have used a store setting for test apps to turn off reviews.
This was not the only fake app on the store that week. A copy of Google Chrome was also found on Google Play a few days earlier.