Quotebook is the paperwork layer for people who do the work and then have to invoice it. You send a quote. The client opens an unguessable URL, accepts or declines with one click, and pays on the same page. Accepting raises the invoice in the same transaction — so you never have an accepted quote and no bill.

No client login. That is the point. “Please create an account to view your invoice” is how invoices go unpaid.

Inside: - Quotes that become invoices the moment they are accepted - Card payment on the public link, with a receipt immediately - Retainers that bill themselves - Print / save as PDF from the browser - A studio-shaped admin: overdue, part-paid, draft-after-accept, declined, live retainers

If you are a designer, consultant or shop that still chases payment in email threads, this is the product you deploy instead of buying another “simple invoicing” SaaS.