Can Zellie change something without me knowing?
No. Zellie suggests, you confirm. Every change shows up as a card with what it goes from and to, and nothing happens until you've tapped it. Zellie never gets further into the system than your own login does.
Which languages does Zellie understand?
Eighteen. Zellie replies in whatever language you write in, with nothing to set up. Your salon's own words, like service names, are never translated.
Does Zellie cost extra?
No. Zellie is included in Foundation, and isn't something you order separately.
Does Zellie see my customers?
Not as people. Zellie sees how many hours are booked and where the gaps are. Emails, phone numbers and notes about your customers never leave the salon, regardless. Zellie only sees a customer's name if that customer has checked the box for it on My Page, and she can withdraw it at any time.