ReactiveNET
Your app in one sentence.
Private by design.
Say what you need — a register, a form, a dashboard — and the assistant builds it in your browser while you watch. No account, no cloud: what you write stays on your device.
Free, opens in your browser, and never asks you to sign up.
You can now create them straight from Claude, ChatGPT or Gemini
What a Reactive app is made of
Under every app there is a Markdown document, and it reads like one: forms that write into a collection, lists and tables that read it back, views that follow every control as you move it. Nothing else — and it all runs in the browser, with no server behind it.
- 110 directives — Spectrum components, forms, boards, calendars, maps and Python.
- No account — the app lives in your browser and travels as a link.
- Open — export it and you get a Markdown file, which any editor opens.
See how it actually works
Four things this system really does, filmed from the real apps. No mockups and no clever cuts.
Write it, see it
Text on the left, a working app on the right. Add one line and the total appears by itself, as you type.
One line of text becomes a total that keeps itself up to date. Open data, already working
Pick a municipality and the dashboard fills with official figures: spending per resident, regional ranking, trend over the years. Click a bar and everything filters.
Real municipal budgets (SIOPE/MEF), queried from the browser. Maths that solves real problems
Teaching posts, constraints and priorities go in; a complete school timetable comes out, with no violations, ready to print.
120 lesson hours placed in under a second, in the browser.
You do not need a huge model
A ReactiveNET app is a short document, not a program: a small model — the kind that runs on your own computer — is enough to write it. No key to buy, nothing leaving the machine, no metered bill.
Small models, not enormous ones
The language is made of directives, and the assistant learns them from the MCP server instead of inventing them: a model of a few billion parameters builds a working app. Large models are for the harder apps, not for starting out.
On your computer, not in the cloud
With Ollama the model runs locally: the request, the conversation and the app's document stay on your machine. It is the only setup where there is no key to keep safe and nothing to defend against.
At no cost
The platform is free and local models are free: no subscription, no per-token billing, no monthly cap. You can use a remote provider if you prefer one, but that is a choice, not a requirement.
Why it might matter to you
Private by design
Apps and data live in the browser: no cloud, no account, nothing to install. They stay where you left them.
The assistant writes it for you
Describe the app you need and the assistant builds it in front of you. If it is not right, Undo is always one click away.
An open file
An app is a Markdown document: open it in any editor, put it under version control, take it with you whenever you like.
Open data built in
Vocabularies, tenders, population, boundaries: you ask the public warehouse with a single directive.
The catalogue
Micro apps that combine and pass each other the same data, written for people with real work to finish.
Open data in your apps
A map of the boundaries, the relations between tables, a live catalogue and a read-only SQL playground: you can look inside the data service before you use it.
Who is behind ReactiveNET
From the blog
Your next app is one sentence away
Free, opens in your browser, and never asks you to sign up.
