Can I sign into the Goodreads iOS app with my Twitter or Facebook or Gmail?
At this time the Goodreads iOS app supports Facebook sign-in. You just need to upgrade to version 1.5 or more.
If you want to sign in with Gmail/Google, Twitter or other 3rd party systems, you will need to use the Goodreads website and create a Goodreads login.
1. Sign into Goodreads as normal using your Twitter/Google/Facebook login on the computer.
2. Head to the "edit profile" option (located in the drop-down menu next to your profile pic in the header).
3. Under the "settings" tab of the account page, there is a space for you to fill in your email address and a password. As soon as you fill these in and save, you should be able to login using this email and password on the website, the iPhone app, and the mobile website.