Quote Originally Posted by surge View Post
An element of GDPR is based on holding necessary data no longer than is needed so presumably there are people all over the country thinking about data collection and storage without making them conspiracy theorists.
Any data should be collected under GDPR, however completely anonymous data isn't subject to GDPR.

Without seeing the app, if it generates unique ID with no identifying data other than say phone number, there's next to no personal data involved. If u enter name, address etcthen that data will as always be subject to GDPR.