Booking system
A system where customers book appointments, resources or rooms themselves — with automatic availability checks, payment and reminders, instead of phone calls and a spreadsheet calendar.
For companies still coordinating appointments, rooms or resources by phone or spreadsheet. We build a booking system that checks availability in real time, handles payments and sends reminders automatically — connected to your existing calendar instead of an isolated silo.
What's included
Availability checks
Customers only see genuinely free slots or resources — no double bookings.
Payment at booking
Deposit or full payment directly in the booking flow, if you want it.
Automatic reminders
Email or WhatsApp reminder before the appointment — fewer no-shows.
Calendar integration
Sync with Google Calendar or your existing system.
Building a booking system: rules, payments and effort
A booking system looks simple until two people book the same slot at the same moment. Quality shows in the rules, not in the calendar.
Availability is the real task
Whether a slot is free rarely depends on a single resource. A treatment needs a room, a specialist and sometimes a device. Add buffer times, breaks, opening hours, public holidays and lead times. The system calculates the bookable times from all of that — and only shows what is actually possible.
Double bookings are prevented by the database, not the interface: a booking is only saved if the slot is still free at that exact moment. During payment it stays reserved for a few minutes and is released automatically afterwards.
Payment, cancellation and no-shows
Missed appointments cost revenue. Reminders, a deposit or a stored payment method help. Which fits depends on your sector — a medical practice decides differently from an event venue.
We store cancellation rules in the system: free until when, partial from when, voucher in which cases. Refunds run automatically through the payment provider. A waiting list refills freed slots without anyone making calls.
Calendars, time zones and notifications
Staff keep managing their time in their usual calendar; the booking system reads busy times from Google or Microsoft and writes new appointments there. For online appointments and international customers the system converts time zones and daylight saving correctly.
Confirmations, reminders and changes go out by email, SMS or WhatsApp. We build these flows with n8n, so wording and timing can be adjusted later without a developer.
What drives the effort
The booking form is the smallest part. Effort grows with every rule the system has to know.
- Number and interdependence of resources: people, rooms, devices, locations
- Booking types: single appointments, series, groups with capacity, multi-day bookings
- Pricing logic: tiers, vouchers, memberships, seasonal prices
- Integrations: calendar, payment provider, CRM, accounting
Industry Expertise
Bubble
Webflow
Zapier
Bubble
Webflow
Zapier
Zapier
Webflow
Bubble
Zapier
Webflow
BubbleOur Projects

SAP Partner Summit
Event networking app with NFC and QR scanning for fast contact exchange at SAP events.
- NFC & QR contact exchange
- Networking for SAP events

Nearby Spots
Motorcycle community app with rider profiles, personal garages, shared content, push notifications and RevenueCat subscriptions.
- Push notifications
- RevenueCat subscription paywall

Fokus Nachhilfe
Swiss online platform for organizing and managing tutoring lessons.
- Swiss tutoring platform
- Appointment & course management

SportsForce
Mobile Tinder for sports recruiting: a FlutterFlow app with custom swipe widget, matching, ranking and Supabase backend.
- Mobile recruiting app on FlutterFlow
- University-level matching, no Google Maps

Life Algorithm
Fitness app with guided workouts, personalized training plans and muscle recovery tracking.
- Guided real-time workouts
- Muscle recovery & statistics

Wellup
Wellness app for training and nutrition routines with a focus on motivation and daily habits.
- Habits & routines in one place
- Motivation through clear goals

Caster Wizard
Monitoring and control system for steel plants: incident reports and expert feedback through an admin panel.
- Real-time steel plant monitoring
- Incident reports via admin panel

Breakletics HIIT the Beat
Fitness app that combines high-intensity interval training with breakdance moves.
- HIIT meets breakdance
- Community fitness app

Empathia
AI-powered nutrition and health tracker built with a bariatric surgeon: one chat instead of five separate apps.
- AI assistant with RAG on medical expertise
- Niche-first strategy with 10-15x TAM potential

Miera
Learning app for students with task planning, streaks and badges to keep daily practice motivating.
- Streaks & badges for motivation
- Task & lesson planning

Players for Good
Sports and donation app: basketball fans turn their performance into “Good Energy” for nonprofit clubs.
- Gamified donation campaigns
- Clubs & community focus

CalMePlease
AI-powered nutrition app with flexible meal logging, personal goals and progress tracking.
- Five meal-logging methods
- Personalized AI feedback

CPD
ERP system for agency work records, contributor payouts and project finance.
- n8n data synchronization
- Project and portfolio finance

Kissmet
Local dating app with values-based matching, requests, chat and a Next.js waitlist landing page.
- Values-based matching
- Nearby discovery & mutual requests

RaedHealth
Premium HealthTech app for Saudi patients: Arabic RTL experience, English dietitian panel, and Zoho CRM, WhatsApp and payment integrations.
- Arabic RTL + English LTR in one app
- Zoho CRM, WhatsApp & payment integrations

FESCO
Mobile app for truck drivers in container transport: track trips, capture container and seal data, keep vehicles and licence details in the profile.
- Trips with terminal, unloading and depot status
- Container & seal data captured in the app

Fundora
Web investment platform: balance, investments and returns in one dashboard, plus a primary and secondary market, deposits and withdrawals.
- Primary & secondary investment market
- Auto-invest, bonuses & referral programme

Grow Bank
Mobile finance app: accounts, cards and invoices, a crypto portfolio with statistics and an overview of the user's partner network.
- Accounts, cards & invoices in one app
- Crypto portfolio & partner network
Common questions about this use case
Let’s discuss your project
Free and non-binding — book a slot straight away or drop us a message.
Dennis Polevik
CEO
Free intro call with Xmethod
- Free, no obligationNo obligation and no cost
- Straight with the teamStraight with the team, no sales reps in between
- A concrete next stepYou leave with a concrete next step
Dennis Polevik
CEO
Let's discuss your project
What happens next?
- Reply within 1 business dayWe review your project and get back to you within 1 business day
- Short call on your goalsWe hop on a short call to align on scope and goals
- Clear proposal, no obligationYou get a clear proposal — no obligation, no pressure











