[Maarten88]

> So now the EU is in charge of how I decide to build my app, and is trying to dictate what suppliers I can use?

No, the EU only stipulates that you are not allowed to sell, leak or otherwise slander personal data from EU residents without their freely given consent, and makes you liable for that.

IANAL, but I think there is no reason to fear too much, though I would stay on the safe side regarding interpretation. And remember that anybody can report you for anything to the authorities, or sue you already; if you are prosecuted you'll have to pay your legal fees and fines whether it's about GDPR or not.