AI does the writing; you make the decisions. Every AI step shows its price first, asks before changing anything, and leaves you code you own.
In the steps where something has to be written or reasoned about: the requirements review, the design, the code, the chat, look-and-feel options and the go-live guide. Each of these shows an ⓘ AI label in the app.
Other steps use no AI: installing, building and testing your code in the sandbox, live previews, downloads, pushing to GitHub, billing and your account settings.
Claude, made by Anthropic. Stormbreaker sends your project to Claude through Anthropic's API and shows you the result. You can also use your own Claude API key (Account page); then Anthropic bills you directly and the quality is the same.
It reads your idea and your answers, restates what it understood so you can correct it, and asks only the questions that would change what gets built, mostly as one-tap choices. It suggests; you decide. A review costs a few cents.
It drafts a design document: two or three stack options with honest trade-offs, the screens, the data, the security notes and the risks. Nothing is built until you approve it. You can ask for changes in plain words, or skip the review in your Account settings. A design usually costs under $1.
Stormbreaker writes the app file by file, following the approved design. The code is then installed, built and tested in a private, temporary sandbox, and Stormbreaker fixes what fails. You can watch the files appear.
Before it starts you see a fixed price, based on what similar builds really cost: you pay the real cost, never more than that price. It always fits the limit you set. If the full design would cost more, you see ways that fit: a less expensive Claude model, a smaller first version, or the design document to build with other tools. If something breaks, report it: the work done so far is kept and the build continues from there instead of starting over.
It answers questions about your project using its requirements, design and code. When it suggests a change, it asks first; nothing changes until you say yes. Each reply costs a few cents.
For people without a clear look in mind, AI designs three current options for the main screen: colours, fonts, layout, motion and a full-page mock you can open at full size. The mocks run no code and load nothing from the internet except their fonts (from Google Fonts). Your pick is saved as a requirement that the design and code follow. Projects without screens (APIs, scripts) don't need them.
AI reads the commands and settings your code actually uses and writes step-by-step instructions to put it live on your own accounts: a web host, an API host or an app store. Stormbreaker never hosts your app. Read the commands before you run them, as you would any instructions.
What you give the project: your idea, your answers and messages, documents you upload, the design and the code. It is sent to Anthropic to produce each answer. Anthropic's commercial terms say API data is not used to train its models by default.
Please don't put passwords, private keys or other people's personal information in a project. Code runs in temporary sandboxes that are deleted after about an hour.
You do. The code is plain, standard code with nothing that ties it to Stormbreaker: download it or push it to your GitHub and run it anywhere. Want a different technology? Ask, and the team rebuilds it.
Yes. The tests in the sandbox catch many mistakes, and Stormbreaker lists the known issues it could not fix, but generated code is a strong first draft, not a guarantee. Review it before you rely on it, especially for security, payments and personal data. Stormbreaker is in beta: larger apps are built in phases, and each phase is tested before the next one starts.
Every step that uses AI shows its price first. You can set a limit per build and per month on the Account page. New accounts start with a free week in low-cost mode. With your own Claude key, the AI is billed by Anthropic and not by Stormbreaker.
Only when a requirement cannot be met without it, and then it says why and what it costs to run. Most features (validation, search, checks, reports) are done with plain code, which costs you nothing each time someone uses your app.
Choose “Report this problem” on the Code step instead of retrying. The files written so far are kept, the team checks whether the build can be continued, and you see the progress on the Code step. Retrying from scratch costs the whole build again.
Move a project to the Trash from the project menu (you can restore it from the bin in the corner). To delete your account and all its data, contact the Stormbreaker owner.