Some apps will allow you to sign in with a social media account to access their services, or unlock particular features. Such is the case with Evernote, currently giving free users access to the business-card-scanning feature if they connect a LinkedIn account. This connection allows the app to find the corresponding LinkedIn profile for business cards that you save. If you're in this particular situation, or you've connected another app you want to remove, you can do so by following these three steps:
Step 1: Head to LinkedIn.com and click your profile image at the top right. Then, click Manage next to Privacy & Settings. (You may need to sign-in again.)
Step 2: Click Groups, Companies & Applications on the left, and then View your applications.
Step 3: Place check marks next to the apps you want to disconnect and click Remove below the list.
The ability to remove LinkedIn app connections is a bit hidden within the settings area. However, now you can easily sample a service requiring a LinkedIn account to log in and then remove the connection immediately after if you aren't interested.
Do you use social media accounts to log in to other apps? Which ones? Share your experience in the comments.