Warning! Badly broken user interface, I wouldn't trust these programmers to get the end-to-end encryption right.

On the second screen of the app there is already an infuriating bug: they ask to give your work email because than you go hire in priority on their invite-only waiting list. So you type in your email again and again and again, alternating between all your emails, but you keep returning to the form asking for your work email. You check those emails to see if they send you something to activate your account but nothing. Exasperated you try the only other button, sign up with private email instead. Guess that works, because you leave the infinite loop. But than zilch, nada, nothing.

Don't these script-kiddies use their own app?