Hot Tub is available in the AltStore PAL, which is a small app store only available to users in the EU. Despite its small size it has managed to receive financial support from longtime Apple rival ...

The app, Hot Tub, is not available on Apple's own iOS App Store, but can be downloaded via the third-party AltStore, which can only be accessed on iPhones in Europe.

That’s exactly what a fake Vodaphone app does on the iPhone. The Display Co-Processor (DCP) is a new section of the M1 SoC, and this malicious app uses it in one of its bundled exploits.

AltStore said Hot Tub was notarised by Apple and described that move as making the app "the world’s 1st Apple-approved porn app," raising Apple's ire.