# Online appointment booking: definition Source: https://terminio.ai/en/glossar/online-appointment-booking · Updated: 2026-09-06 ## Definition Online appointment booking is the scheduling of appointments through a web page on which a customer selects a service, a person and a free time slot and books it, at any hour and without a phone call. The appointment lands directly in the business's calendar and is confirmed automatically. ## How online appointment booking works It starts with a well-kept calendar. The business sets up its services with a duration and a price, enters opening hours and staff rotas, and decides how far ahead customers may book. From these details the software works out which slots are free. Only those slots are shown to the customer; everything else stays hidden. The customer opens the booking page through a link, picks a service, a person if it matters, and then a free slot. They enter a name and a mobile number and book. The slot is blocked in the calendar at once so nobody else can take the same time. A confirmation goes out automatically, by WhatsApp, SMS or email depending on the system. A reminder follows before the appointment. Anyone who cannot make it cancels or reschedules through a link, within the notice period the business has set. Where needed, the system asks for a deposit before the booking is final. The whole flow runs without a single phone call. - Services with a duration and a price - Availability derived from opening hours and rotas - A booking page for choosing service, person and time - Automatic confirmation and reminder - Cancellation rules and an optional deposit ## Why online appointment booking matters for businesses with appointments Every booking that arrives online is one call fewer. If you cannot answer the phone while you work, those appointments go to the next business that picks up. With a booking page the customer books alone while your hands are busy. A large share of bookings typically arrives outside opening hours, in the evening and at the weekend. Then there is reliability. The customer has the date and time in writing, is reminded in good time and can cancel with one tap. That cuts forgotten appointments noticeably. And because every booking goes straight into the calendar, there are no notes, no call-backs and no double bookings. ## Limits and what to look for Online appointment booking is only as good as the data behind it. If rotas or durations are wrong, the page offers slots that do not exist or leaves gaps. And not every customer wants to book online: some will keep calling, especially with complex requests or an older clientele. The business still needs a way to handle calls, such as a phone assistant that hands out free slots on its own. - The calendar and rotas have to be kept up to date - Customers should be able to book without an app or an account - Confirmation and reminders should run automatically - State the notice period and any deposit clearly on the page - Callers still need a way in ## How terminio.ai does it terminio.ai gives every business its own booking page that is ready in minutes: name, services, opening hours, done. Customers book through the link with no app and no account, just a name and a mobile number. Every booking lands in the team calendar, the confirmation goes out on WhatsApp from your own number, and reminders follow the sequence you set. The booking page is included in the Free plan: up to 50 bookings and five WhatsApp reminders a month for 0 EUR, with no setup fee and no payment details. Pro costs 19.99 EUR a month and lifts both limits. Deposits run through Stripe, and hosting is in the EU. ## Common questions **What does online appointment booking cost?** It depends on the provider. Many systems charge a flat monthly fee, some a fee per booking. With terminio.ai the booking page is part of the Free plan, with up to 50 bookings a month. Pro with unlimited bookings costs 19.99 EUR a month, with no commission and no setup fee. **Is online appointment booking GDPR-compliant?** Yes, provided the provider processes data in the EU, asks only for what a booking needs and offers a data processing agreement. Look for a privacy notice on the booking page. terminio.ai hosts in the EU and asks for nothing more than a name and a mobile number to book. **Do I need my own website for online appointment booking?** No. The booking page is a web page in its own right, with its own link. You put that link in your Google Business Profile, your Instagram bio, your WhatsApp status or on an existing site. Your customers need no app and no account, only the link. --- terminio.ai is online appointment booking for small businesses with WhatsApp reminders and an AI phone assistant, from €0 a month, hosted in the EU. Provider: terminio.ai UG (haftungsbeschränkt), Großschönau, Saxony, Germany.