We commissioned this audit in late December and iSec began working on it in January. They audited a pre-release prototype that we provided. This is noted in the audit document, but it's hard to spot unfortunately.
The reason we commissioned this audit is to make sure our prototype was audited before release on the App Store. We're very happy to have benefited from this audit, but linking to this PDF alone de-contextualizes the effort and makes it seem like it's an audit of the production version of Cryptocat for iPhone, whereas the version we provided was an early prototype. The audit did find some issues with the (already-released) desktop version and server configuration, and those were also fixed and documented in our blog post.
I sincerely appreciate you taking the time to read our blog post on the matter and thank you for your understanding.