The onboarding process was really jarring. I expected to be able to use it instantly. Instead, I had to wait ~30 seconds while my username was registered, and now I'm sitting on my hands waiting for some SMS with a code that will allow me to login. Also, there's no easy way for me to use the app with other people without inviting them first (which, given my circle of friends and family, would have to be preceded by a sales pitch on why they should download this stupid thing in the first place).<p>As an app that prioritizes ease-of-use and fast communication, Yo really falls flat on it's face.<p>I'm not going to comment on the potential usefulness of this app, because I'm sure others will and I don't think it'll yield any particularly interesting discussion. References will be made to Snapchat and WhatsApp, the word "bubble" might come up, etc.