It's very simple - just login using any of your existing apple, gmail or Facebook account
A wide range of devices are supported, anything running android 5.0 for android and for apple all current devices support this app.
Parentance guidance is advised while using this app, features to block inappropriate content are available though we still advice to allow this to be used by kids under parental guidance
From your profile section, its easy to navigate to settings page from where you can logout and then delete th app