What is the difference between log in and sign up?
Classic mix-up! Log in (or sign in) = access existing account with creds—quick entry to your stuff. Sign up = create new account, fill details, set password—first step to join. Ex: Netflix—sign up for sub, log in daily. UX tip: Use "Register" vs "Log In" to avoid confusion. Both secure data, but sign up unlocks personalization. Quora: Sign Up vs In
Security lens: Log in risks brute-force; sign up needs CAPTCHA. Both essential—log in for continuity, sign up for growth. UXMovement: Button Labels
UX designer rant: "Sign up/in" too similar—users click wrong 20% time. Better: "Create Account" / "Sign In". Log in protects via 2FA; sign up builds profile. Medium: Half sites use log, half sign. Medium: Guide to Terms
Dev angle: Sign up registers user in DB, verifies email. Log in authenticates via JWT/token, starts session. No "log up"—typo? Log out ends it. Auth0: Forms similar, but flows differ—social login blurs. Pro: Separate buttons reduce errors. Auth0: Login vs Signup
Everyday: Sign up for Amazon (new user), log in next time (returning). Sign out = exit. No log up—invalid. ELL: Differences