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How AI is changing the way software gets built

AI & development · 6 min read · Rengstorff AI

Not long ago, getting a custom app built meant months of meetings, specification documents and invoices. Today, AI tools are compressing much of that work into days. But what is the AI actually doing? Here's a plain-language tour of each stage of a software project, and where AI makes the biggest difference.

1. Turning your idea into a plan

Every project starts with understanding what you need. Traditionally, an analyst would interview you and spend days writing a requirements document. AI can take a conversation, a few voice notes or even photos of your shop menu and turn them into a structured list of screens, features and user journeys within minutes.

That means you can review a concrete plan almost immediately, spot what's missing, and change direction before anything expensive has happened.

2. Designing the look and feel

AI design tools can generate layouts, colour palettes and sample screens based on your brand and your industry. Instead of waiting weeks for a first draft, you can compare several directions in a single meeting and pick the one that feels right.

3. Writing the code

This is where the biggest speed-up happens. Modern AI coding assistants can write large portions of a website or app: page layouts, forms, product catalogues, booking flows, payment integrations. Experienced developers guide the AI, review what it produces and handle the tricky parts, a bit like an editor working with a very fast writer.

The key point: AI doesn't replace engineering judgement. It removes the repetitive typing, so skilled people can spend their time on the decisions that matter for your business.

4. Testing and fixing

Bugs are a fact of life in software. AI helps by writing automated tests, checking the app on many screen sizes and suggesting fixes when something breaks. Problems that once took a day to find can often be diagnosed in minutes.

5. Launching and publishing

Publishing to the web, the Apple App Store and Google Play involves a lot of paperwork: descriptions, screenshots, privacy details and technical settings. AI can draft much of this material, so your launch isn't held up by admin.

6. Updates after launch

Your business changes, and your app should too. Because AI makes changes quick to implement and test, adding a new product category, a seasonal promotion or a loyalty feature no longer needs to be a major project.

What this means for merchants

AI has turned custom software from a big, risky investment into something a small business can try quickly and grow over time.

Have an app or website in mind?

Tell us about it in plain language. We'll come back with a plan, a timeline and a clear price.

Email contact@rengstorffai.com