Designed for your processes
The tool follows your organization, not the other way round: your stages, your statuses, your vocabulary.
Custom business apps
An app tailored to the way you work.
Quotes, scheduling, inventory, client follow-up: I build the web tool that replaces your spreadsheets and subscriptions. Available from any browser, secure, and ready to grow with your business.
- 1 to 6 months depending on scope
- Code handed over to the client
- 3 months of support included
Book a 30-minute call from $6,800 (€6,000)excl. VAT
In short
A custom business app is web software designed for the processes of one specific company: quotes, scheduling, inventory, client follow-up or invoicing, brought together in a single tool. I build it in 1 to 6 months depending on scope, from $6,800 (€6,000)excl. VAT, and the code is yours once the project is paid for.
Why go custom?
One tool instead of five
No more re-typing between the spreadsheet, the CRM and the invoicing software: data flows on its own.
Secure
Role-based access, protected data and GDPR compliance built in from the design stage.
Scalable
New modules are added when your business needs them, without rebuilding everything.
Who is it for?
SMBs that have outgrown the spreadsheet
Your Excel file has become the heart of the business, but it crashes, gets duplicated and nobody dares touch it.
Teams juggling several tools
A CRM here, a quoting tool there, a schedule somewhere else: your team spends its time copying data across.
Trades poorly served by off-the-shelf software
The way you work is specific and no standard software fits without compromise.
Businesses that want to stay in control
You want to own your tool and your data, without depending on a vendor’s price increases.
What’s included
Included
- Scoping workshops and requirements document
- Interactive mockups to approve before any development
- Development in batches, tested by your team
- User accounts and role-based permissions
- Migration of your existing data (Excel, CSV)
- Go-live, training and 3 months of support
- Source code and documentation handed over to the client
Optional or not included
- Hosting (from a few tens to a few hundred euros a year)
- Maintenance and new features after the 3 months of support
- Third-party service licenses (paid APIs, transactional emails)
- Native mobile app published on the stores
Technologies: React · TypeScript · Node.js · Supabase · PostgreSQL · Stripe
Real example
O’GYM
A complete web app for a sports club: members, prospects, invoices, stock, shop, coach and partner areas, brought together in a single tool.
See the project →
What I build most often
Business app
Automating your internal processes: requests, approvals, reminders, dashboards.
- 1 to 3 months
- $6,800 to $22,500 (€6,000–€20,000)excl. VAT
Custom ERP
Complete management of your business, with modules specific to your trade.
- 3 to 6 months
- $16,900 to $56,200 (€15,000–€50,000)excl. VAT
SaaS platform
A software product to offer your own clients, like Nooxup V2, a 4-in-1 platform for venues.
- On quotation
Indicative durations and ranges: the fixed quote is drawn up after the scoping phase.
How we work
- 011 to 2 weeks
Needs analysis
Functional and technical audit of your needs.
- Requirements document
- Technical architecture
- Schedule
- 022 to 3 weeks
UX/UI design
You see and test the app before it is built.
- Interactive mockups
- Design system
- 034 to 12 weeks
Development in batches
Each batch is delivered and tested by your team before the next one.
- Documented source code
- Tests
- 041 week
Deployment
Secure go-live and handover to your team.
- App online
- Training
- 3 months of support
Further reading
Frequently asked questions
How much does a custom business app cost?
Allow $6,800 to $22,500 (€6,000–€20,000)excl. VAT for an app focused on a few processes, and $16,900 to $56,200 (€15,000–€50,000)excl. VAT for a complete ERP. The quote becomes fixed after the scoping phase. Details are on the Pricing page, and the estimator gives you a range in one minute.
How long does it take to build?
From 1 to 3 months for a focused app, from 3 to 6 months for a complete ERP. The exact schedule is set during scoping, and you test the app batch by batch.
Who owns the code?
You do. Once the project is paid in full, the source code and the rights to use the app are transferred to you, along with all access.
Can you bring over the data from our Excel files?
Yes. Migrating existing data (Excel, CSV, export from old software) is planned from the scoping stage, so you start with your history.
Does the app work on mobile?
Yes. It is available from any browser, on computer, tablet and phone, and can be installed as an app (PWA) if needed.
Can it connect to our other tools?
Yes, through their APIs: accounting software, online payment, email, calendar, existing CRM. The required connections are listed from the scoping stage.
What happens after go-live?
Three months of support are included. After that, maintenance and new features are billed separately, as a package or by the hour depending on your needs.
Let’s talk about your project.
30 minutes to review what you need. Free, no commitment.