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Custom booking systems & client portals

Custom booking systems for gyms, clinics and schools, built around how you work.

Online booking, payments, reminders and member or client portals in one system, so your team stops chasing messages and spreadsheets. Built by one senior engineer for a fixed price, and you own the code.

Book a free call Free admin checklist
Fixed quote before we start You own the code and data Weekly demos, no surprises
wizard@build ~ deploy
$ wizard deploy yourbusiness
✔ Client logins & portal  live
✔ Online booking          + reminders
✔ Invoices & card payments Stripe
✔ CRM & accounting sync   automatic
✔ Backups & monitoring    on
$ _
Built by one senior engineerNo handoffs, no outsourcing
10+Years building enterprise systems
2 to 8Weeks for a typical build
1:1One senior engineer, start to finish
100%Your code and data, no lock-in
Sound familiar?

Your booking system should save you time, not create it.

What owners of gyms, clinics and schools tell us before we start:

“New members still message us on WhatsApp or Instagram to book a class.”
“Every new enquiry turns into five emails before we agree a time.”
“People pay by bank transfer and someone matches it up by hand every week.”
“No-shows cost us a full slot, and we never get round to charging for them.”
“We pay for a booking app, but we still keep a spreadsheet next to it because it doesn't fit how we work.”

If two or more of these are true, you are probably losing 5+ hours a week to admin. Check with our free 25-point checklist →

What we build

One custom system instead of ten spreadsheets.

Booking, payments, client portals and integrations, designed around how your business actually works. Then we keep it running.

Client portals & dashboards

A secure place where your clients log in to see their account, invoices, bookings, files and requests. Plus a dashboard that shows you the numbers that matter.

Booking, membership & billing

Online bookings, class schedules, memberships and recurring payments with automatic reminders and invoices, so you stop chasing people.

Internal tools & admin systems

Replace the spreadsheets, paper forms and copy-paste with one system built around how your team actually works.

Integrations & automation

Connect your website, CRM, accounting, payments and email so data flows on its own and manual work disappears.

Websites that do the work

Fast, SEO-ready websites that capture leads and plug straight into your systems, not just a brochure.

Care, hosting & email

After launch we keep everything updated, backed up, monitored and secure, with email deliverability set up properly.

How we build your system

Five steps from “we do it by hand” to a booking system that runs itself.

Each step exists to stop a problem we've seen sink other software projects.

Map how you work

“We don't know exactly what we need.”

A free call and a written map of your day: bookings, payments, messages and spreadsheets. You get a clear list of what to automate first.

Fixed scope & price

“Software projects always overrun.”

A written plan with screens, timeline and one fixed price, paid in milestones. No hourly billing.

Build with weekly demos

“What if it's not what we pictured?”

You see working software every week and change direction early, not after launch.

Move your data & train the team

“Switching will be chaos.”

We import your customers, plans and bookings and train your staff, so day one feels normal.

Care & improve

“Who fixes it when something breaks?”

The same engineer keeps it secure, backed up and improving on a simple monthly care plan.

Our work

Systems we have built.

Real products in daily use, not mock-ups.

All case studies
SaaS platform · Fitness

Wod Lab: the all-in-one platform for boutique gyms

A complete product for functional fitness gyms: class booking, memberships, payments and member engagement, with each gym getting its own branded app.

  • Class schedules, bookings and waitlists
  • Booking credits with fair no-show and late-cancel rules
  • Memberships and recurring payments
  • Installable, branded app for every gym (PWA)
Visit wodlab.app
Admin dashboard of the client management system, shown with demo data
Client portal · Billing · Support

A client management system with portal, billing and tickets

The platform this website runs on: leads, clients, subscriptions, invoices and support tickets in one admin, plus a portal where clients log in, pay and ask for help.

  • Client portal with invoices, plans and tickets
  • Card payments by Stripe or bank transfer, auto-renewals
  • Lead inbox, CMS, blog and SEO built in
  • The same foundation can run your business
See the screens
Free download

Where is your business leaking time?

The Booking & Admin Leak Checklist: 25 yes/no checks for gyms, clinics and schools, each with a quick fix. Takes 10 minutes.

  • Booking, payments, reminders, customer data and reporting
  • Score yourself and fix the biggest leak first
Instant access. No spam, unsubscribe any time.
Charbel Founder & Lead Engineer
Who builds it

Enterprise-grade engineering, small-business attention.

Debugging Wizard is run by Charbel, a senior engineer with more than ten years of building complex systems for large organisations. After building Wod Lab, a booking and membership platform for gyms, he now builds custom booking systems, portals and integrations for small businesses that have outgrown off-the-shelf tools.

10+ years in enterprise systemsComplex integrations and workflows for large organisations in finance, where an error is not an option.
Built and runs Wod LabA class booking and membership platform for functional fitness gyms, so we know your day from the inside.
One accountable engineerThe person on your first call is the person writing your code and supporting it after launch.
You own everythingClean, documented code and your data, with no lock-in and no per-seat fees.
More about us
Who it's for

A custom booking system for businesses that have outgrown their tools.

If your team copies data between apps, chases payments by hand or runs the day from a spreadsheet, a custom system pays for itself.

Gyms & studios

Class booking, memberships, credits and payments in one branded app.

Clinics & practices

Appointments, reminders, patient forms and invoicing without the admin pile.

Agencies & consultants

A client portal for files, approvals, tickets and invoices, under your brand. White-label for agencies →

Trades & field services

Quotes, job scheduling, photos from site and invoices sent the same day.

Schools & academies

Enrolments, timetables, fees and parent communication in one place.

Growing SMEs

Internal tools and dashboards that replace spreadsheets and manual reporting.

Pricing

Fixed prices, no hourly surprises.

Every project starts with a free call and a written, fixed quote. Paid in milestones.

Focused system

One clear job done properly, for example a client portal, online booking or a quoting tool.

from€2,500 one-off projectexcl. VAT
Typical timeline2 to 4 weeks
Start a project
  • Discovery workshop & written scope
  • One core module (portal, booking, billing…)
  • Admin panel for your team
  • Card payments and invoices if needed
  • Launch, training & handover docs
Most chosen

Business system

The system your business runs on: clients, bookings, billing and reporting in one place.

from€6,000 one-off projectexcl. VAT
Typical timeline4 to 8 weeks
Start a project
  • Everything in Focused system
  • Several connected modules
  • Integrations with your CRM, accounting or email
  • Dashboards & reports
  • Data migration from spreadsheets
  • 30 days of free fixes after launch

Platform

Bigger builds: multi-location, multi-tenant or a product you sell to others, like a SaaS.

Custom quote
Typical timelinePhased roadmap
Start a project
  • Everything in Business system
  • Architecture & roadmap
  • Multi-user roles & locations
  • API for apps and partners
  • Delivered in phases you can launch

After launch, care plans from €99/month keep everything updated and improving · See care plans

Free tools

Check your website and email in seconds.

Free diagnostics and developer utilities, no sign-up needed. Found a problem? We can fix it for a fixed price.

All 15 tools

Email Deliverability Checker

Check SPF, DKIM, DMARC and MX records and get a deliverability score.

→ run free check

DNS Lookup

Look up A, AAAA, MX, TXT, NS, CNAME, SOA and CAA records for any domain.

→ run free check

SSL Certificate Checker

See issuer, expiry date, covered domains and days left on any SSL certificate.

→ run free check

HTTP & Security Headers

Inspect HTTP headers, redirects and grade your security headers.

→ run free check
From the blog

Practical guides for growing businesses.

Systems, websites, performance and email, explained clearly.

View all articles
FAQ

Questions, answered.

How much does a custom system cost?

Most projects land between €2,500 and €15,000 depending on scope. After a free call we send a fixed quote, so you know the full price before any work starts, paid in milestones.

How long does a project take?

A focused system such as a client portal or booking setup usually takes 2 to 4 weeks. Larger business systems take 4 to 8 weeks. You see working progress every week.

Who owns the code and the data?

You do. You get the full source code, your data and documentation. There is no lock-in: if you ever want another developer to take over, they can.

Do I need a care plan after launch?

It is optional but recommended. A care plan keeps the system updated, backed up and monitored, and gives you hours each month for changes. Plans are monthly and you can cancel any time.

Can you work with the tools I already use?

Yes. We regularly connect WordPress, Stripe, Google Workspace, Microsoft 365, Mailchimp, HubSpot and accounting tools, so your new system fits into what you have.

How do I pay?

Projects are paid in milestones by bank transfer or card. Care plans are billed monthly by card or invoice, and every invoice is in your client portal.

Can you fix a one-off problem without a project?

Yes. Email deliverability fixes, broken forms, slow sites: tell us what is wrong and we will send a fixed quote before starting.

Running your business on spreadsheets?

Tell us how things work today. We reply within one business day with ideas and a rough budget.

Start a project Book a free call