We are free to download apps in Google Play Store and App Store. And we believe the Apps are secure without any problem. Apple has removed “Adware Doctor” from the macOS App Store and claims that the program was uploading browser histories. As far as we know, our browse history collect by 3rd party is not the first time. Even though your defense software will be collect your internet activities in silent way. The collection of internet activities is hard to avoid today. Since we are living in so called big data world. On the other hand, App Store (Apple) found that threat actors may craft a malicious code embedded in application put in App store. The goal is going to read persistent account identifier. It looks that it is the way to receive your credential to evade the detection. So there is an security announcement on apple products this week (see below):
iOS 12: https://support.apple.com/kb/HT209106
Apple Support 2.4 for iOS: https://support.apple.com/kb/HT209117
Safari 12: https://support.apple.com/kb/HT209109
watchOS 5: https://support.apple.com/kb/HT209108