A report has revealed an extensive ad fraud scheme called "Vapor," which has infiltrated the Google Play Store with over 180 malicious applications that garnered more than 56 million downloads before being removed by Google. These apps, which mimic legitimate applications, primarily target categories like flashlight utilities, QR code readers, and horoscope generators. They initially appear functional but later remove legitimate features in updates, replacing them with intrusive advertisements that hijack the device's interface. Some vapor apps achieved over one million downloads, aided by app install schemes that inflated their rankings. Google has committed to removing violating apps and provides Google Play Protect to safeguard users. Users are advised to be cautious and avoid installing low-value applications to mitigate risks.