Developers of fleeceware apps are now using the Apple App Store as a distribution platform having already delivered their iOS apps onto over 3.5 million iPhone and iPad devices. Sophos discovered 40 such apps on Google’s Play Store last year, some of them being downloaded over 100,000,000 times and asking for annual subscriptions of up to 467.48 ($511) if paid weekly. To use the apps, you are required to sign up for a trial using payment info, a trial that you have to later cancel if you don’t want to be charged.
Source: https://www.bleepingcomputer.com/news/security/over-36m-users-installed-ios-fleeceware-from-apple-s-app-store/