Capacity
FreeCapacity lets you turn your ideas into fully functional web apps in minutes using AI.
FreeFree tier
Inputs: textOutputs: code
About Capacity
Capacity is an AI-powered development platform that lets users build web apps, mobile apps, and full-stack applications using plain English descriptions. It provides real backend infrastructure with an Express server and SQLite database, eliminating the need for third-party services. Users can refine their ideas step-by-step with an AI co-founder that offers 24/7 assistance, create visually appealing apps without design skills, and publish projects live with a single click. Capacity supports unlimited projects, full agentic mode access, and offers features like custom domains and code export for advanced builders.
Key Features
Build apps using plain English descriptions (no coding skills needed)
Refine vision step-by-step with AI co-founder
Full-stack apps with real backend (Express server + SQLite database)
One-click publish to go live instantly
AI co-founder provides 24/7 assistance, suggestions, and code
Create beautiful web and mobile apps without design skills
Custom domains supported
Export full codebase from Growth plan upward
Full agentic mode access for complex task handling
Pros & Cons
Pros
- No coding or design experience required
- Real backend infrastructure included (Express + SQLite)
- One-click publishing to production
- AI co-founder available 24/7 for guidance and code generation
- Allows step-by-step idea refinement before building
- Supports custom domains and code export
- Credits never expire and pay-as-you-go billing
Cons
- Credit-based billing may become expensive for heavy usage
- Complex tasks consume more credits
- No free tier; plans start at $25/month
Best For
Building a first full app or MVPRapid prototyping of web and mobile app ideasCreating production-ready full-stack applications without codingTeams managing multiple products with shared creditsBuilding and testing small projects or ambitious apps
FAQ
How does credit-based billing work?
Credits are consumed based on usage. Each message to the AI agent uses a variable amount of credits depending on the complexity of the task – simple requests use fewer credits, while complex operations like building features or debugging code use more. Users only pay for what they use, and credits never expire.