Your account

Profile, time zone, language, password, two-factor sign-in and backups.

In short: Profile, time zone, language, password, two-factor sign-in and backups.

Settings → Account holds everything about you rather than your booking page.

Personal information
Your name, phone, time zone and language. Your time zone is the one dates are shown in across the app.
Security
Change your password.
Two-factor authentication
Ask for a code from an authenticator app at sign-in, with backup codes for when you do not have your phone.
Getting started
Take the tour, or Run setup again. Rerunning keeps everything you have already set up.
Backup & restore
Download everything on your account as one file. Restoring puts back your profile, booking page branding and notification preferences; appointments, contacts and schedules are in the download for your records but are not written back.

Plan & billing, the other tab, shows your plan and lets you change or cancel it.