You aren’t going crazy — there’s no button to log out of Noom on Android and iOS. There are a couple of workarounds, though, one of which can be used on all devices, the other is exclusive to some Android handsets.
How to Log Out of the Noom App
Uninstalling the application will sign you out, where upon reinstalling it you will be returned to the login screen when you can either sign in to your account or create a new one. Keep in mind you will need to uninstall it each time you want to sign out.
How to Use Two Noom Accounts on One Device
Alternatively, if you’re using a Samsung device you can use Secure Folder to create a new, clean version of the Noom application in a sandboxed environment that’ll let you create a new account or sign into an existing one.
The beauty of Samsung’s Secure Folder feature is that it’ll let you have two Noom accounts on one device. It isn’t the same as signing out, sure, but if you’re wanting to use two accounts, it’s the easiest way to do it.
Your other option if you want to use two accounts on one device is to open the second one in your web browser and use Noom for Web. You can create a shortcut to this to save on your homescreen so you can jump into it at any time.