Interestingly the applications are free to collect any personal data as they are not included in GDPR. When I requested from one company to let me export my data from the application in a human readable format or to at least send documentation of their file format, so that I can port my data to another application, they refused saying that GDPR only applies to online apps. It's possible that companies will be moving their online apps to electron or native phone apps to bypass GDPR.