Here is a simple guide on how to log out from WhatsApp on different devices:
On Android and iOS Devices
WhatsApp does not have a traditional 'Log Out' option for its mobile app on Android and iOS. Instead, you must delete and reinstall the app, or clear the app's data to remove your account.
To delete the data:
Log Out of WhatsApp on WhatsApp Web or Desktop App:
Remember, the steps might slightly vary based on your device and its operating system version. Always ensure to back up your chats if you don't want to lose them.
Please note that clearing data or uninstalling the app from your mobile device doesn't log you out from WhatsApp Web or the Desktop App, and vice versa. You need to log out from each separately.