I think it's because it's harder to update an app... and publisher don't really care: they see apps limited to the phone even when they display ads... Moreover,

I think it's because it's harder to update an app... and publisher don't really care: they see apps limited to the phone even when they display ads... Moreover, mobile ads publisher may not have already updated their sdk. Deleting the apps from the appstore wouldn't be a real solution since the datas are already out of the phone... So, basically, it seems to me that phone apps are less GDPR compliant, that's all