Capacity Desktop is an AI app builder that runs on your Mac.
Describe what you want and it builds a real web, mobile or desktop app, saved in a folder on your computer • Sign in with the Claude or ChatGPT plan you already pay for, or use an API key or a local model. No marked-up credits • Start from a complete app like a CRM or Linktree Pro or 80+ pro designs • Generate images, video, music, sound effects and 3D models inside the app • Publish to Vercel, or to a server you own, in one click.
Hey PH We're Baptiste & Samuel, and next week we're launching Capacity Desktop a free Mac app that turns plain English into real apps, built and stored on your machine.
The bet everyone tells us is wrong: move away from credits system. You plug in your own Claude / GPT / Open Router key and pay your provider at cost. Our take is that you feel the credits system is unfair, you never know what a failed fix loop just cost you, and you feel the tool profits from your retries.
A Mac app that turns plain English into real apps — built and stored on your machine, not someone else's servers. Your code, your GitHub, your own AI at cost. No marked-up credits, no lock-in. Free, no sign-up. macOS (Apple Silicon), Windows on the roadmap.
Most AI app builders jump straight into building.
That feels fast until your app gets messy, inconsistent, and nothing like what you imagined.
Today, we’re introducing Spec Coding in Capacity.
Instead of building immediately, Capacity now lets you define your app first with the help of an AI co-founder that asks the right questions before any code is generated.
More structure upfront.
Far less refactoring later.
Much better results.
