Optional
You do not need an account
Every assessment, every report and every payment works without one. An account does exactly one thing: it keeps your results reachable when you change phone or clear your browser. That is the whole feature.
Sign in with a link
Results you have already produced on this device are attached to the account when you sign in. Nothing is moved or lost.
Only paid for a report and lost the link? You do not need an account for that either — restore it with the email you used at checkout.