How to log out of your Chess.com account
Web
To log out of your account on Chess.com, hover over ‘Settings’ in the bottom-left corner of any page and select ‘Log Out.’
Mobile
The steps below work for the iOS and Android mobile apps:
Tap on 'More' at the bottom right corner of your screen and select 'Settings'
Tap 'Log Out' at the bottom of the list:
Extra Security
If you are using a shared or public computer, always make sure you log out of the site completely before leaving the computer unattended.
If you forgot to log out on a computer, go to 'Settings' in the bottom-left corner of any Chess.com page, select 'Account,' scroll to the 'Extra Security' section, and click the 'Log Out on All Devices' button to sign out from those browser sessions.
To sign out of all mobile devices, just reset your password or username from any computer or mobile device. The next time you open the app, you’ll be asked to log in again.
Check out this article to learn how to keep your Chess.com account safe and secure: How can I stay secure on Chess.com?