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.
Ghost Canvas turns your iPhone or iPad into a tracing projector (a digital camera lucida)
$2.99
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.
Kit ready. Verify your email to download it.
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.
Ghost Canvas turns your iPhone or iPad into a tracing projector (a digital camera lucida). Pick any photo, see it floating over the live camera view, line it up with your paper — and draw. HOW IT WORKS • Import a reference photo from your library, camera or recent shots • Adjust opacity, position, scale and rotation with simple gestures • Lock it in place and start tracing what you see on screen TOOLS THAT MAKE TRACING EASY • Outline mode — turn any photo into clean contour lines (two engines: fast vector contours and high-quality FDoG line drawing) • Monochrome and posterize filters to simplify busy references • Line color adapts automatically to how bright your paper is • Grid overlay for classic grid-method drawing • Strobe mode briefly hides the overlay so you can check your marks KEEP IT STEADY • AR anchoring pins the reference to your table or canvas, so it stays put even when you move your device • Corner pinning with perspective correction for drawing at an angle CAPTURE YOUR PROCESS • Record a timelapse of your drawing session and share it as a video YOUR WORK, EVERYWHERE • Projects with automatic iCloud sync across your devices • Time-spent tracking for every project Ghost Canvas is a one-time purchase. No subscriptions, no ads, no account. Your photos never leave your device (iCloud sync stores them in your private iCloud, which only you can access).
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.