Ai.type was a pretty popular 3rd party keyboard app for Android available on the Play Store. However, it was removed from the Play Store after security reports of displaying invisible advertisements and requiring unnecessary permissions. It is worth noting that it was an app on the Android marketplace with more than 40 million downloads. It wasn’t so popular at the App Store, but it was also available for iOS devices. Millions of devices still tend to continue using the app and it is highly possible that they are not aware of the shady techniques used by ai.type app. While invisible advertisements might seem harmless, signing up for unauthorized purchases for premium content alarming. Upstream Secure-D mobile security platform uncovered the finding in their recent report.