Lack of audit is not great I agree. I can see from a basic web search that security is an issue but I’m not sure ’nightmare’ is warranted. The lack of audit seems to be main focus of concern and I’d say thats a judgement call for each person depending on threat model. I was hoping for something more conclusive than that. Its certainly adequate for a more privacy-centric way of communicating than an app that doesn’t cater for Apple users at all.