Pray your UUID doesn't get mistaken in their DB – Sudo: Secure Private Messenger Review

Great concept, but never having run Sudo before, it automatically gave me a login error upon every launch without me doing anything saying my login wasn't valid. I was unable to get past the title page to even see a menu. Somehow my brand new shrinkwrapped iPhone UUID got in their database, or was mixed up with someone elses. They were unable to find my UUID, or their assigned customer number found in Apple's Settings Preferences, so they couldn't fix their internal database. They stopped responding to my email. Regardless of clean installs and trying every version for a year, their app never worked. Unfortunately, they don't let people register by username or phone number, just an automatically embedded UUID.
Review by Eastmarch on Sudo: Secure Private Messenger.