“Our application is designed to provide as much anonymity as possible without storing any user data or creating accounts,” reads part of the lengthy message. The ICEBlock iOS app can piggyback on Apple’s iCloud infrastructure to route push notifications because every iPhone user is guaranteed to have an iCloud account. But you might have spotted the problem: ICEBlock isn’t collecting device data on iOS, but only because similar data is stored with Apple instead. For either ICEBlock’s iOS app or a hypothetical Android app, law enforcement could demand information directly from the company, cutting ICEBlock out of the loop. ICEBlock says your data is safe because it doesn’t have any, but that doesn’t mean it isn’t out there.