How do you log out of gatherer?
You don't.
Piotr. Should really add that.
Yeah. You kinda need to back up, delete the app and login again.
Why do you need to log out?
Accidentally logged onto friends phone, thinking it was mine :/
I know Piotr has said this before, but I don't remember where.
A phone is a personal item, meaning only one person will generally be using it, which would make it unnecessary to log out.
Go here:
http://imtgapp.com/forum/index.php?theme=1 (http://imtgapp.com/forum/index.php?theme=1) and log out