Bespoke App & Software Design
Software built to your brief — specified by a person, built with AI, tested for real.
HJS Apps designs and builds custom mobile apps, web tools and e-commerce software for businesses that need something that fits, not something that almost does. A person defines exactly what gets built and why. AI makes the build fast. Real testing and QA make it dependable. The efficiency is passed on as a fair price.
From a single tool to a full product
Tell us the problem. We will tell you plainly what it takes, what it costs and how long it will take — and whether it is worth building at all.
Mobile apps
Android and iOS apps from one codebase — offline tools, companions for your shop or service, customer-facing apps. Published to Google Play (and the App Store when you want it).
Web apps & internal tools
Calculators, configurators, dashboards, booking and quoting tools, admin screens — the software a business ends up doing in spreadsheets, done properly.
E-commerce extensions
Custom modules and plugins for OpenCart, PrestaShop and WooCommerce — payments and invoicing, catalogue behaviour, stock, SEO, checkout and order handling.
Integrations & automation
Connect the systems you already use — APIs, order and data flows, notifications, messaging and AI-assistant integrations that take repetitive work off your team.
Websites & online shops
Custom-designed websites and shops, built, launched and tuned for search — not a template with your logo on it.
Rescue & improvement
An existing app, plugin or site that is slow, fragile or half-finished? We audit it honestly, fix what is broken and tell you what is not worth saving.
A clear process, with a person in charge of it
AI writes code quickly. It does not decide what you need, and it does not tell you when it is wrong. That is why every project is specified, checked and signed off by a human.
Discover
A short call or message thread. We learn the problem, the users and what “done” looks like for you.
Specify
A person writes it down: scope in, scope out, screens, rules, price and timeline. You approve it before anything is built.
Build
AI-accelerated development against that specification, with the design and decisions kept in human hands.
Test
Automated checks plus real use on real devices and real stores. We hunt for what breaks, not just what works.
Launch & support
We deploy it, submit it to the store where needed, hand over the documentation and stay available afterwards.
Faster and cheaper — without the guesswork
“Built by AI” on its own means unchecked. Our approach keeps the speed and puts the judgement back.
- A person specifies every project. Someone accountable decides what gets built and why — and says no when an idea is not worth building.
- Faster development. AI does the heavy lifting on the build, so timescales shrink and so does the bill.
- Real testing and QA. Every product is validated on real devices and stores before release. We publish nothing we have not driven ourselves.
- Affordable by design. The efficiency is passed on. You get a written, fixed quote, not an open-ended day rate.
- Straight talk. If your idea has a flaw, a cheaper route or an existing product that already does it, we say so.
Proof, not promises
Everything below is our own live work.
E-commerce extensionsOpenCart 4, OpenCart 3 and PrestaShop modules, sold from this shop HJSAPPS24 appOur shop as an Android app, live on Google Play HJS Solutions appAndroid app, live on Google Play HJS Woodworks & a custom online tray designerA bespoke web configurator with pricing, previews and checkoutBefore you get in touch
How much will it cost?
It depends on the scope, so we do not publish a price list. After a short scoping conversation you receive a written fixed quote. If the honest answer is that it is not worth building, we will say that instead.
Do you really use AI to build the software?
Yes, openly. AI accelerates the writing of code; a person sets the specification, makes the design decisions, reviews the output and tests the result. That combination is what keeps the cost down and the quality up.
Who owns the finished software?
Ownership, licensing and any ongoing hosting are agreed in writing in your quote, before any work starts, so there are no surprises.
How long does a project take?
Small tools can be quick; larger products take longer. You get a realistic timeline in the quote and a clear picture of what will be delivered at each stage.
Can you take on an existing project?
Often, yes. We start with a short, honest review of what exists, then recommend fixing, rebuilding or leaving it alone.
Do you publish to Google Play and the App Store?
Yes. We prepare the store listing and handle the submission with you. Android usually comes first, with iOS built from the same codebase.
Tell us what you need built
Send a few lines about the problem, or just the idea. You will get an honest answer, a clear plan and a fixed quote — with no obligation.