The Appointment Booking System is a free iPhone app developed by Dominique Andr Gunia. It falls under the category of Business & Productivity and offers a convenient solution for setting up a booking system for your customers.

With this app, you can easily create a booking system by answering a few questions. The setup process is quick, taking only a few minutes. Once set up, you will receive a link to a website that you can share with your customers. On this website, they can view your available appointment slots and book them.

When a customer books an appointment, you will receive an immediate notification. Additionally, you have the option to receive an email notification as well.

The app allows you to use it for free for up to 20 hours of bookings per month. If you require unlimited bookings, you can subscribe to the monthly plan. The subscription costs $1.99 for each of the first 2 months and then $9.99 per month. The subscription will automatically renew unless canceled, and you can manage your subscriptions through the App Store app.