Custom web app development
Custom web apps and internal tools, built for how you work.
0ARCH builds custom web apps and internal tools for small businesses: the internal tool, customer-facing feature, or inventory system your next step needs. Defined piece of work, fixed price, code you own.
Fixed scope and price after reviewing the requirements. Existing code is checked before a repair is priced.
The spreadsheet you run on, turned into a tool.
An order sheet like the real ones. Sample data.
- Your sheet, as it isOrders, names, and notes in one place, with question marks in the margins.
- Turned into a toolEvery order is a row with a status and one button.
- Nothing falls throughShip one and the count changes for everyone at once.
Same data you already have. Nobody asks who shipped what.
Interactive example with fictional orders. Nothing is sent anywhere.
Inventory, orders, invoicing, and a plain-English assistant for a wireless distributor. In daily use since 2025. Customer names on screen are changed.
In use since2025What we build
Custom software for a small business usually means one of these. Each one starts as a written scope with a fixed price, and you own the code at the end.
What custom software costs
Small pieces start around $1,500. Most full systems land between $5,000 and $40,000, and the price is fixed once the scope is written, so there is no hourly meter running. What moves the number is the count of screens, the tools it has to connect to, and how many people use it with different permissions.
We have written the ranges up in detail: what custom software costs in 2026, what a custom CRM costs, and what a client portal costs. Each post has a short estimate form at the end. Three picks and one line about your business get you a real range within a business day.
Hosting is separate and small. The systems we build run on modern edge infrastructure for tens of dollars a month, and there are no per-seat fees. Support after launch is optional, not a renewal you are locked into.
Custom CRM development
A CRM is the custom web app we get asked about most, usually after a team has outgrown a free tier or a spreadsheet with one tab per salesperson. The custom version has your pipeline stages, your fields, and your follow-up rules, and nothing else. It connects to your email, your calendar, and your accounting software instead of asking you to move into a new suite.
If you are weighing it up, start with custom CRM vs HubSpot and how long a custom CRM takes to build. The custom CRM development page covers what goes into one and how the work is priced.
Custom inventory management software
Off-the-shelf inventory tools assume a warehouse shape you may not have. Custom inventory management software starts from your stock: what units it comes in, where it sits, how it gets counted, and which supplier files it arrives in. Barcode scanning, reorder points, and imports get built around those answers.
The largest system we run is an inventory, orders, and invoicing system for a distributor, in daily use since 2025, where imports that took three days now take seconds. The post on why large CSV uploads break operations software comes from that work, and replacing spreadsheets with custom software covers the step before it.
How it gets built
It starts with a text or a call describing what is slow. We look at how the work happens today and what a fix would need to touch, at no cost. That turns into a written scope with a fixed price. You see a working first milestone before the rest of the build starts, so a wrong turn gets caught early. After launch the code is yours, and the same person who scoped it answers the phone a year later. The full sequence is in how custom software gets built.
Before any of that, we check whether something you already own does the job. Sometimes the answer is a feature you have not turned on, or an automation on top of the tools you have. If spreadsheets are the problem, we say what to build next and what to leave alone.
Questions people ask
How much does custom web app development cost?
Focused pieces start around $1,500 and most full systems land between $5,000 and $40,000. The price is fixed once the scope is written. Screens, connections to other tools, and the number of user roles move the number more than anything else. The cost posts linked above break the ranges down.
Is custom software worth it for a small business?
When the process is yours and the off-the-shelf tool keeps fighting it, yes. When a $50 a month tool does 90 percent of the job, usually not, and we say so on the first call. The build vs buy post on our blog has the five questions we use to decide.
Why not Airtable, Retool, or a template?
We check whether an existing tool can do the job first. Custom development is an option when the requirements justify it, with ownership and handover agreed in the scope.
How long does it take?
The schedule depends on the scope and any existing code. Small internal tools ship in weeks; full systems are delivered in milestones over a few months, and you use the early ones while the rest is built. You get a delivery plan before work starts.
Can it connect to what we already have?
We check the available connections, permissions, and any software fees before committing. QuickBooks, Google Workspace, Microsoft 365, and most phone, calendar, and payment tools have connections we can use. The aim is to work with your existing tools wherever practical.
Who owns the code?
You do. The code, the database, and the hosting accounts are in your name at handover, with documentation. There are no per-seat fees and no lock-in. If you want someone else to maintain it later, they can.
Do you build customer-facing apps or only internal tools?
Both. Internal tools your team opens every morning, and customer-facing pieces like portals, booking flows, and quote forms that sit on your website. JunkZipp, our own junk removal booking site with a hauler app behind it, is the customer-facing kind.
What is the difference between a custom web app and a website?
A website tells people about you and gets them to call or book. A web app is software your team or your customers log in to and work in: orders, inventory, jobs, invoices. We build both. The website side has its own page with a flat price, and this page covers the software side.
Who builds custom internal tools and web apps for small businesses?
0ARCH is a one-person software studio run by Joseph Rodriguez, who scopes, builds, and supports every internal tool and web app himself. Work starts as a written, fixed-price scope, and you own the code and the accounts it runs on when it ships, with no account manager or handoff to a different developer.