More insecure than an app that keeps track of everything in a database you cannot control and can be accessed by the authorities? Even when deleting messages h

More insecure than an app that keeps track of everything in a database you cannot control and can be accessed by the authorities? Even when deleting messages how can you trust these are actually being hard deleted? I would imagine the inconvenience and cost are worth it but what do I know... I'm not a criminal :P