It'll cost you all your apps - it's the APP DEVELOPERS who are putting those trackers in and you'll need to give the apps up to get rid of them.
They most definitely do not remove such apps.
Use an app like Charles Proxy or Burp Suite to inspect the traffic of your phone when running the “Perfect365” app. It is really remarkable, and Apple is aware of what they are doing.
One interesting side effect of GDPR is the surprising amount of PC games - games for which I paid price that's presumably profitable to the authors - that started throwing up consent forms.