Sophos has published a new report showing how Apple device users are being targeted by applications that overcharge users through costly subscriptions or unscrupulous in-app purchases.

Sophos calls this kind of app “fleeceware” and researchers have found more than 30 iOS fleeceware apps available on Apple’s official App Store. Between them they appear to have been installed around 3.6 million times, according to publicly available data.

The fleeceware apps include image editors, horoscope/fortune telling/palm reader, QR code/barcode scanner, and face filter apps, with some charging weekly subscriptions of $9.99 (or $520 a year).

Sophos first alerted mobile users to fleeceware in September 2019, when it found a number of such apps available for Android phones. In January 2020, the researchers published a further paper, Fleeceware Apps Persist on the Play Store, detailing the discovery of another 20 such applications, with nearly 600 million alleged installations between them, as reported by Google Play.

“The main purpose of the iOS fleeceware apps we found seems to be severely overcharging users,” said Jagadeesh Chandraiah, senior security researcher at SophosLabs and the report author. “As was the case with the Android apps discovered in 2019, the app developers take advantage of monetization practices widely used by legitimate free apps, but take them one step further. For example, in the hands of the fleeceware app developers, short free trials followed by a monthly subscription soon add up to hundreds of dollars a year in charges, and in-app purchases turn out to be essential for good app functionality rather than optional enhancements or extras.

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