How AI app builders differ

AI app builders all promise the same headline: describe an app and get one back. Underneath they make very different trade-offs, and those trade-offs decide whether what you get is a throwaway demo or something you can run. Here are the axes worth judging them on.

What actually gets built

Some tools generate a front end and stop — pretty screens with no backend, so the moment you need saved data or logins you're on your own. Others generate raw code you then have to host, secure and wire up yourself.

Vorx builds the whole app from a description: screens, data model, auth and backend together, running in a live preview you refine by chatting. The distinction that matters is whether a tool produces a working, connected app or a starting point you still have to assemble.

Whether anyone checked it works

Generation is cheap; correctness isn't. Plenty of tools hand you the first thing the model produced and let you discover the broken page.

Before you see a Vorx build, it's rendered in a headless browser, signed into as a test user, and clicked through its main flows — anything that throws gets fixed and retried. That's why a first build takes several minutes rather than seconds. Ask any builder what happens between generation and the thing appearing on your screen; often the answer is nothing.

How you make changes

The first build is the easy part. What separates these tools is the second, tenth and hundredth change.

• Some regenerate the whole app each time, quietly discarding your tweaks
• Some drop you into a code editor and expect you to make the change by hand
• Some let you refine in plain language against a live preview

Vorx is built for the last of these, with every change saved as a checkpoint you can roll back for free. A tool that's brilliant at generation and awkward at iteration will frustrate you within a week.

The data layer

How an app stores and syncs data is invisible in a demo and decisive in production. A tool can generate beautiful screens and still leave you with slow saves, no offline support and no realtime collaboration.

Judge an app builder by what happens when two people use the app at once.

That layer (VorxSync: instant local writes, realtime sync, offline support) is on our roadmap rather than shipped today. It's infrastructure that's hard to retrofit either way, so it's worth asking any builder — us included — whether it's actually built or just promised.

What it costs to iterate

Pricing shapes behaviour. A tool that charges per generation makes you hesitate before trying the ambitious version; one with an opaque meter makes you guess.

Vorx charges a run on the real model spend it used, rounded to whole credits, and shows you the cost on every reply. Undoing is free, because it doesn't call a model. Whatever tool you're comparing, ask what an experiment costs and what a mistake costs.

Ownership and lock-in

This is where platforms diverge most sharply. Some builders keep your app inside their walls: you can run it there and nowhere else, and leaving means rebuilding.

Vorx gives you the app and the code — connect a repository, take it, host it anywhere. When you evaluate any builder, ask plainly: if I stopped paying tomorrow, what do I walk away with?

The honest trade-off

Describing an app is faster than building it by hand, and it also means the tool makes decisions for you. For a highly specialised system with unusual requirements, hand-written code by an experienced team still wins on control. AI builders are strongest when you want a real, working app quickly and value iteration and ownership over bespoke engineering.

In the docs: How Vorx works and Welcome.