Under DMA, Apple had to make changes to its business practices starting last year. In one of the biggest changes, Apple was forced to relax restrictions on its App Store, by allowing people in the 27-nation bloc to download iPhone apps from stores that it did not operate.

In the EU, Apple's gatekeeper status changed with the 2022 adoption of the Digital Markets Act, which required Apple to allow alternative app stores.

The Hot Tub app could be the canary in the coal mine as far as the dangers of third-party app stores are concerned. Next up: malware.