Yo, the minimalist messaging app that sends nothing but Yo alerts to your friends, has launched its first major update for iOS. How do you improve on an app that does nearly nothing? Well, in version 1.1 youre now able to edit your own profile to include a photo and your real name, which should make contact lists more readable. Theres a useful-sounding feature that lets you Yo a link when its saved to your clipboard. Theres also a less useful-sounding feature that lets you send a Yo to a hashtag and see how many other users have Yod it. …