Is it safe to use Yelo?
There's no personal information or messages being stored server-side. You don't have to provide
any kind of username or
password since authentication is delegated to 3rd party entities like Google or Facebook.
When using public computers don't forget to logout properly (also logout from Facebook or
Google) and it might not be a good idea to
store messages and contacts but for private computers, turning it on is recommended for better
performance.