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Log In vs Login vs Sign In
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This is a subjective question, but as a team you may need to come to an agreement on what is 'right' for your product. Here are some snippets of information gathered for a team discussion.
Sign In & Sign Out
- Familiarity: Jakob Nielson (the 'father' of UX) did a study back in the early 2000s and decided to use sign in/out rather than log in/out. While that was quite some time ago, in 2010 Lee Munroe did an informal follow-up and showed that sign in/out was still more commonly used.
- The only valid argument against this format that I have found is that it can be confusing when used next to 'Sign Up'.
Sign Up vs Register or Create an Account etc.
- Sign Up can convey a more legal or contractual feel for some users.
- When using Sign In, Sign Up is too close and becomes harder for users to parse, causing more incorrect clicks.
Login vs Log In
- Login is the noun/adjective form referring to the form, page or actual credentials.
- Log In is the verb form referring to the action. i.e., "Use your login credentials to log in via the login page."
Personally, I'm a fan of using Sign In and Create an Account.
Further Reading
- https://loginisnotaverb.com/
- quora.com/Diction-and-Word...t-Login-or-Log-In
- https://www.leemunroe.com/login-vs-signin/
- grammarpartyblog.com/2013/09/05/...n-vs-login/
- https://grammarist.com/spelling/log-in-login/
- ux.stackexchange.com/questions/1...sing-log-in
- quora.com/What-is-the-diff...-one-VS-the-other