Describe it. Get an app.
One sentence in, one working single-file web app out — streamed live as it’s written, published at your own URL.
1
Describe it
“A tip calculator for six friends.” One sentence is enough — add detail if you care about the details.
2
Watch it build
The app’s code streams in on the left while the app itself takes shape live on the right.
3
Publish it
One click puts it on the web at 1sh.app/you/tip-split — share the link or keep it to yourself.
Free service, your models
1sh.app is free — you bring your own API key from OpenRouter, Anthropic, OpenAI, or xAI. Your key is encrypted at rest and only ever used for your own requests.
Published apps are user-generated content: sandboxed, never search-indexed, and unlisted unless their owner adds them to Explore.