We mean it’s literally a fake security app: the only thing that it does is change from an “X” image to a “check” image after a single tap. That’s it. That’s all there is, there isn’t any more.
“New #1 paid app in Google Play store is a total scam” via Android Police.
Open is great until folks fall for a $4 scam like this. Thankfully it does nothing harmful but its a bit scary how quickly it was able to skyrocket to #1.