Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
At the Science Museum in London, my kids were enjoying a drawing game they found in an area next to the space exhibit
$1.99
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
At the Science Museum in London, my kids were enjoying a drawing game they found in an area next to the space exhibit. Actually, it was hard to pull them away from it. I promised them I would make something similar. While we were still at the museum, I pulled out my phone, and in just a couple of minutes using Claude, it produced a little kaleidoscope drawing game that was actually better than the one from the museum. My kids fell in love with it, and it honestly made the rest of the trip easier. They kept asking me to play it. They played with it on the tube. They played with it while I did some shoe shopping on Jermyn Street — for much longer than I expected. They played with it on the plane on the way home. They've really enjoyed sharing their creations with me and my wife, and they asked me to get a version going that they could use on their iPads as well. So here it is, for anyone else to use. I hope it's fun for other kids to play creatively as well. WHAT'S INSIDE • Six glowing inks and an adjustable brush. • 4, 6, 8, 12, or 16-fold symmetry. • Mirror mode for kaleidoscope reflections; Spiro mode for spirograph loops. • Slice guides, undo, one-tap clear. • Save and share the artwork they're proud of. A CALM KIND OF PLAY No lessons, no timers, no scores. Just a quiet circle that turns whatever your child draws into something beautiful — and hands them the joy of having made it.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.