A free, quick four-letter personality type test: 24 questions (~3 min) or the full 48. Get your type, how clear each preference is, close-call neighbour types, and a profile with strengths, blind spots and the cognitive function stack. No sign-up; sign in only to save reports. Independent; not affiliated with any test publisher.

quaterna.skillsafe.ai

Run app here

PricingCompletely free

Security scanClean — skill and frontend scanned

Created2026-10-05

Updated2026-10-17

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.