FullDiary charges a flat monthly price for your shop, whatever it takes. Book ten appointments or five hundred, add one team member or eight - the price is the same. Nothing is taken from a booking, and there is no marketplace sitting between you and your customers.
The free plan includes 20 bookings a month, your booking page and the live diary, with no card needed to start. Paid plans add unlimited bookings, reminders, deposits and more locations: one location on Free and Starter, three on Growth, unlimited on Business.
The full comparison, and how this differs from the apps that charge a commission or a finder's fee, is on the pricing page.