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.
searching for= 「尋找；搜尋」。search for ... 表示搜尋某人或某事物。
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.
the same ... as= 「與……相同的……」，用來表示兩者完全一致或相同。
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.
may have used= 「可能曾經使用了……」。「may have + 過去分詞」表示對過去事情的推測。turn off= 「關閉；停用」，指將某項功能或設定關閉。
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.