Build Your Own Offline App
Build the small app that your workflow has been quietly asking for — offline, private, and yours to keep as a single file.
Most software you use every day is a website in a trench coat. It phones home, tracks you, and can be turned off by someone you've never met. The App Factory takes the other road: you build your own app inside a single HTML file, on your own machine, and it stays there. No account. No server. No lock-in. When you're done, you export one file — that's the app.
Why "offline" is the interesting part
Offline isn't a limitation, it's a guarantee. When there is no server, there is nothing to breach, nothing to be sold in a bankruptcy, nothing to change under you at the vendor's whim. The apps you build in the Factory work on a plane, in a cabin, in ten years — the same way a text file does.
What you can actually build
Trackers, calculators, small planners, private journals, checklists that carry state, tiny CRMs, single-purpose calculators — the kind of quiet tool that no catalog would ever carry because its audience is one person. That person is you.
How much code you need to know
Some. The App Factory is honest about that. It's HTML, a splash of CSS, and JavaScript for anything interactive. The manual walks the first apps through end to end; the source is open; the exported file is the whole thing on a plate.
Frequently asked
Is it really free?
Yes. The App Factory is free and open-source under the MIT licence. Download it, fork it, sell what you build with it. There is no upgrade path, no team tier, no catch.
Does it require an internet connection?
Only to download the initial file. After that it runs entirely in your browser, offline. Your work never leaves your machine because there is nowhere for it to go.
Can I sell apps I make with it?
Yes. Anything you forge is yours, including commercially. The MIT licence explicitly allows this.
Is there a support line?
No. It is a gift, not a product — for the kind of person who reads the manual and opens the console. The manual is deliberately thorough and the source is open so you can figure things out.
One HTML file · MIT-licensed · works offline · nothing to install.