Custom web applications — your processes in one interface
Spreadsheets renamed "database", lost emails, appointments written on the corner of a notepad: an SME's operations often rest on fragile shortcuts. NEXUS AGENCE builds custom web applications — business forms, dashboards, client and inventory management, integrations — so information lives in one place, with controlled access, tested backups and upkeep over time.
Scoping → prototype → iterations → production · fixed-price quote before the first line of code · 50% / 50% payment
What we build
Most SMEs don't need multinational software: they need the right information in the right place, available to the right person, at the moment the work happens. These three modules cover the majority of situations — and they combine into a single application.
Paper, phone calls and email become one entry point: the client fills it in, you receive a complete, filed request.
No more opening four files to answer "where do we stand". Management sees the real state of the shop, the counter or the clinic.
Clients book themselves against your real availability, with no email back-and-forth and no double bookings.
Data and integrations
A useful application doesn't live in a silo: it connects to what you already use and replaces what costs you time. Anything beyond the agreed scope is named and priced before it gets built.
Client records, service history and stock quantities live in the same application as requests and appointments.
The application reads your inbox, triggers automations and stays connected to your other systems — with no re-typing.
The application runs on managed infrastructure, with the domain and hosting covered for the first year.
Application security
As soon as an application holds clients, prices or files, security stops being a technical detail. It is built in from the start, then maintained over time, just like a cybersecurity practice.
Everyone gets their own account: no more shared password, no session left open at the counter. Passwords are hashed, never stored in plain text, and access is revoked in a minute on someone's last day.
Every creation, edit or deletion is timestamped and tied to an account. When a record is in doubt, you know who changed what and when — a consultable, exportable log that settles the discussion before it escalates.
Transport is encrypted end to end (HTTPS), sensitive fields are encrypted at rest, and no confidential detail travels in plain text inside notification emails: they invite you to open the application rather than copying the file.
An application gets patched, monitored and adjusted. The upkeep plan covers updates, security patches, backups and small changes — cancellable month to month, with no forced renewal. See the package grid.
The method
No line of code is written before the scope is set down in writing. Each stage produces something you can read, test or correct — and the price stays the one on the signed quote.
One or two meetings, on site or by video: together we describe the current process, the roles, the data and the pain points. You have nothing to prepare — the real work is the starting point. The output is a clear scope note: what gets built, what doesn't, and the fixed-price quote that goes with it.
Clickable screens filled with your real data (anonymized where needed), tested by two or three people who do the work every day. This is the cheapest moment to move a field or drop a screen: everything is still easy to change.
Building proceeds in short deliveries: each round is tested by you on a staging environment, commented in one pass, then approved. You see real progress instead of a reassuring status report. Requests that fall outside the scope are priced before they are added.
Go-live after your sign-off, team training on day-to-day tasks, short written documentation, backups and monitoring enabled. A shakedown period follows the launch: adjustments during that window are part of the mandate.
Pricing
The front-end site that goes with the application follows the grid shown on this site: $500, $1,200 or $1,500. The application work itself is then quoted at a fixed price after scoping — every screen, integration and access rule is listed in the quote before work starts, with no hourly billing and no surprise at the end.
The starting point: a clean front-end site that presents the service and receives requests, even before the application exists.
Most chosen
The complete site the application moves into: several pages, a clear structure, a solid base.
The most common shape for an application project: a detailed journey, booking, and a client area.
59.99 $ / month
MaintenanceUpkeep covers updates, security patches, availability monitoring, backups and the small changes requested month after month. No commitment: cancellable month to month. The site and the application keep running even if upkeep stops.
Frequently asked
The front-end site that goes with it follows the official grid published on this site: $500, $1,200 or $1,500. The application work itself is quoted at a fixed price after scoping, and that amount is written in the quote before the first line is written. If a need appears along the way, it is priced before it is built. Monthly upkeep is $59.99 per month.
The schedule is set during scoping and written into the quote: every stage has its date, from prototype to go-live. The prototype arrives before construction, the first usable version follows the iterations, and you know in advance when the team will be able to work with it. No mandate drags on without you knowing why.
Yes. Your data remains your property: hosted on NEXUS AGENCE's managed infrastructure or on your own, as the quote specifies. A full export is handed over at the end of the mandate in a readable format — you are not dependent on the vendor to walk away with your files.
No, and that's not the goal. The application handles the work those tools do badly: requests, appointments, inventory and file tracking. For accounting or payroll, it connects through an API or an export, so your data is only entered once.
Yes: IMAP email, n8n for automations, APIs for in-house systems, CSV export for everything else. No technology is imposed to look good on a sales page; every piece is chosen because it solves a specific problem, and that is explained in your words before anything gets built.
The site and the application keep running. What stops is upkeep: updates, security patches, monitored backups and small changes. You keep access to the application and to your data, and you can resume maintenance later without rebuilding anything.
Next steps
Contact NEXUS AGENCE for a free 20-minute discussion. We look at your current process — paper, spreadsheets, email — and tell you plainly whether an application is the right answer, or whether a well-built website is enough for now.
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Tommy Lafrance's Web AgencyAGENCE • WEB • CYBERSÉCURITÉ