AP StyleGuard Pro for Web, formerly Lingofy, is an automated style-checking tool for web browsers, developed by Tansa in collaboration with The Associated Press.
Your StyleGuard username and password give you access to the StyleGuard Manager, where you can create your custom entries and see data on your usage.
Your APStylebook.com login lets you manage your subscription, including looking up past receipts, updating your address and payment methods on file and renewing your account.
You create your own unique password on Styleguard.com. It is separate from your login for APStylebook.com. If you reset your password on one website, it does not change or reset your password on the other.