Custom web apps for businesses that have outgrown the spreadsheet

Who this is for

This is for operators whose workflow no longer fits the off-the-shelf tools — and who do not want a six-figure software project to fix it. The sweet spot is the focused internal tool: one job, done properly, integrated with what you already use.

• —A spreadsheet so central that the business holds its breath when it is open.
• —Job tracking spread across a whiteboard, an inbox, and someone's memory.
• —Off-the-shelf software that fits 70% of the workflow, with the other 30% done by hand around it.
• —Customer-facing steps — booking, intake, quoting, status updates — that still run on phone and email.
• —Data trapped in one system that the rest of the business keeps re-typing.

Problems this work typically solves

1. 01

   The workflow gets a real home

   Jobs, quotes, bookings, or compliance records move from fragile spreadsheets into a purpose-built tool with the structure, history, and access control the work deserves.

2. 02

   Systems start talking to each other

   The app integrates with your accounting, email, and existing tools, so information is captured once and flows — rather than being re-keyed at every step.

3. 03

   AI where it earns a place

   Drafting, document extraction, and summarising built into the workflow where they genuinely help — and left out where a plain form and a database do the job better.

If your operation runs on a spreadsheet someone is afraid to touch, that is the project.

What a first engagement looks like

Honest scope: a first build is deliberately small — a working version of the one workflow that hurts most, usually live within weeks, not a year-long platform.

1. 01

   Map the workflow as it really runs

   Not the official process — the real one, with its exceptions and workarounds. This is where most software projects go wrong, so it is where this one starts.

2. 02

   Build the smallest version that takes real load

   A working app handling the core workflow goes in front of your team early. Modern AI-assisted development makes this genuinely fast; the discipline is keeping the scope honest.

3. 03

   Run it alongside, then cut over

   The app runs next to the spreadsheet until it has earned trust on real work. Then the cutover, the documentation, and a clear answer on hosting, ownership, and ongoing support.

When another path is better

• If an existing tool fits 95% of the job, configuration beats construction — AI consulting can tell you which side of that line you are on.
• If the pain is repetitive steps between existing systems rather than a missing system, AI automation is cheaper and faster.
• If you need AI capability added inside software you already own, see LLM integration .

Frequently asked questions

What does a custom web app cost in NZ?

Less than it used to — AI-assisted development has genuinely changed the economics of small business software. A focused internal tool is now a weeks-scale project, not a months-scale one. Exact cost depends on the workflow, which is what the free call is for.

Who owns the code and where does it run?

You own it. Apps are built on mainstream, boring-on-purpose technology and hosted on standard cloud infrastructure under your accounts, so you are never locked to Nelson AI for the system to keep running.

What about security and the Privacy Act?

Access control, encrypted connections, and sensible data handling are part of the build, not extras. Where the app holds personal information, it is structured with the Privacy Act 2020 in mind, including where the data physically lives.

What happens after launch?

Documentation, a handover walkthrough, and an honest support arrangement — from 'call when something changes' to ongoing development, depending on what the business needs. Small focused apps are deliberately cheap to keep alive.

Bring the spreadsheet.

A short call is enough to tell whether the right answer is a custom build, a configuration of something off the shelf, or an automation between the tools you already have.