Book Visit Now does not keep a separate address book. Your clients live in your Apple Contacts, where they sync through your own iCloud and stay yours whether or not you keep using this app. Anyone you book is added to a group called My Clients.

What the app adds is everything Contacts cannot hold.

A private rating. Pick any emoji and decide what it means. It shows next to the client's name on your schedule and nowhere else. Never sent, never shared, never seen by anyone but you.

Do Not Book. A red flag that follows a client everywhere their name appears. It warns you; it does not stop you. Sometimes you take the booking anyway.

Preferences. A free-text list: room temperature, a product the client reacted to, the fact they always want the last appointment of the day.

Notes on the client, and separately on every visit: notes, formula, products used, results.

How they found you, which feeds the acquisition report.

Referrals: who you referred someone to and what it was worth.

Two controls that work together:

Price Bump raises this client's rates above your standard menu. 

Loyalty Discount takes a percentage off at the end. Use one, or both: raise a price and then discount from the raised figure, if that is how you prefer to work.

You can also type over any individual price on any appointment.

Lifetime spend, with cost and gross once you have entered what your services cost you. 

Scheduled revenue: what is already on the books, but not yet completed.

Visit counts: completed, canceled, rescheduled, no-shows. 

Action required: past appointments still needing a final status.

Reporting: to show your highest grossing clients and highest cost clients.

When the app and Contacts drift apart, the Sync Contacts screen scans, shows you every difference side by side, and lets you choose which version wins field by field. Nothing is overwritten until you approve it. The same scan finds duplicate client records and offers a guided merge.

"Delete Client" archives the client and their history rather than erasing it, so your reports stay accurate, and it never changes anything in Apple Contacts.