Build an online booking system — appointments, reminders, fewer no-shows
We build professional websites, apps, online shops and custom systems — with the quality of big agencies but without their overhead. Specialised in Germany's small and medium businesses.
In short
An online booking system starts at €990 net (integrated into your website) or from around €3,900 as a custom solution with calendar, resources, payment and automatic reminders — GDPR-compliant, servers in Germany.
Every missed call is a lost appointment, and every no-show is an empty chair that still costs money. Your own online booking system takes requests around the clock, shows free slots in real time and reminds customers automatically — without you ever picking up the phone.
Rhein Code builds booking systems for salons, practices, studios, consultancies, workshops and anyone who works by appointment. Instead of an expensive standard platform that charges commission per booking, you get a system that fits your workflow and sits neatly inside your own website.
We deliver at a fixed price from 990 € net, GDPR- and BFSG-compliant, hosted on EU servers. A direct line to the developer in German, English or Arabic — and in the end the system and customer data belong entirely to you.
Typical challenges
- Appointments come in via phone, WhatsApp and Instagram — all jumbled
- No-shows cost real money — automatic reminders are missing
- Off-the-shelf tools never quite fit and charge per booking forever
What your booking system can do
- Online appointment calendar with staff/resource selection
- Automatic email/SMS/WhatsApp reminders against no-shows
- Self-service cancel & reschedule by link
- Optional: deposit/payment (Stripe, PayPal, SEPA)
- GDPR-compliant, servers in Germany, no per-booking subscription
Booking System
What your website or solution delivers
24/7 online appointment booking
Customers book themselves anytime, even at night and on weekends, straight from your website. You collect appointments while you work or sleep — with no missed calls.
Real-time availability
The system shows only genuinely free slots that match the service, duration and staff member. Double bookings and overlaps are ruled out.
Automatic reminders
Customers receive confirmations and reminders by email or SMS before the appointment. This noticeably cuts no-shows and frees you from chasing people manually.
Services, duration and pricing
Set up services with individual durations, buffers and prices — from a quick cut to a 90-minute treatment. The system calculates times correctly and only offers matching slots.
Multiple staff and resources
Manage calendars for several staff members, rooms or pieces of equipment. Customers can optionally pick their preferred person, and everyone keeps their own daily schedule.
Calendar synchronisation
Bookings land automatically in your Google or Outlook calendar, and blocked times are respected in return. All your appointments stay in one place.
Deposits and online payment
If you like, a deposit or prepayment can be required at booking time. That further reduces no-shows and secures revenue on popular slots.
Multilingual and mobile
The booking flow works as smoothly on a phone as on desktop and can be offered in several languages. International customers can book without a barrier.
In practice
Real-world examples
A salon with several stylists
Customers book their preferred stylist online, and the system distributes appointments without gaps or double bookings. The phone rings less and the no-show rate drops thanks to automatic reminders.
A practice with a long phone queue
Patients book routine appointments themselves online instead of fighting through to reception. The team gains time for the calls that really matter and the front desk is relieved.
A studio with scarce premium slots
For high-demand treatments, a deposit at booking time secures serious appointments. Cancellations become rarer and freed-up slots can be re-filled faster.
A workshop with fixed service hours
Customers book inspection or tyre-change appointments around available lift times. Seasonal peaks become plannable instead of descending into chaos.
Rhein Code
Why Rhein Code for Booking System
Fixed price, not commission per booking
You pay once from 990 € net for your own system — no platform skimming a cut from every booking. With a full calendar, that quickly makes a big difference.
Integrated into your website
The booking system runs under your brand and your domain, not on someone else's portal. Customers stay with you instead of drifting to competitors in the same directory.
GDPR and BFSG done properly
Appointment bookings often contain sensitive data. We build privacy-compliant, accessible per BFSG, and host on EU servers — with no data passed to third parties.
Direct contact with the developer
You speak directly with the person building your system, in German, English or Arabic. Adjustments to your workflow happen fast instead of disappearing into support.
No lock-in, your customer data
The bookings and customer data belong to you, not to a third-party provider. You can't be squeezed by rising platform fees.
Process
How we work
Intro call
Which services, which resources, which reminders?
Fixed-price quote in 48h
Integrated into your site or as a standalone solution.
Build
Calendar logic, notifications, payment, testing.
Operation
Maintenance, adjustments, analytics.
Technology & standards
- Web / PWA
- Calendar engine
- Stripe / PayPal
- SMS & WhatsApp API
- EU servers
Fixed price
Transparent pricing
Fixed price before we start. All prices net, plus 19% German VAT. No hidden costs.
Starter Website
from €4991–3 pages, mobile-optimized, GDPR-compliant
Standard Website
from €9995–10 pages, blog, contact form
Online Shop
from €1,499Shopify or WooCommerce, DHL/Hermes, PayPal/Klarna
Booking System
from €799Online appointments, SMS/WhatsApp reminders
Optional maintenance from €29/month (updates, backups, small changes).
Free initial consultation & a fixed-price quote within 48 hours — no obligation.
Request a projectFAQ
Frequently asked questions
What does a booking system cost?
Are there commissions per booking?
Does it really reduce no-shows?
Can it be built into my existing website?
Can I manage hours and services myself?
Does it sync with Google Calendar?
Is the system GDPR-compliant?
Do I own the bookings and customer data?
Related solutions & industries
Let's talk
Tell us briefly about your project. We respond within 24 hours.