Am receiving loads of emails from services I don't even remember I've subscribed to, because of GDPR crazyness.
The app would scan my inbox (or spam) for such emails and will show me a link where I can delete my user from the related service.
I found what I'm looking for. It's JustDeleteMe http://backgroundchecks.org/justdeleteme/
It'd be great an app that searches your email for all services that sent you a GDPR email and connects with JustDeleteMe to easily show you the "delete account" button, so one doesn't have to hunt it.