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.
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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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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.
Rork plan preview for MockApp Wireframe UI Mockup: map the core Developer Tools workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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.
Hypothesis 1
Assumption to check: Limited template options compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No collaboration features for team projects.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Occasional performance issues with large mockups.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: User feedback on complex UI elements being hard to use.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
The all-in-one design toolkit for Mac, iPad, and iPhone MockApp is the fastest way to turn ideas into visuals: app screens, websites, wireframes, marketing pages, and documents. Drop ready-made components onto an infinite board, arrange them your way, and export crisp, print-ready PDFs. Every board lives in iCloud and follows you across Mac, iPad, and iPhone. KEY FEATURES • Infinite boards — one home for every idea: app flows, landing pages, moodboards, reports, and more, side by side on a single canvas. • 200+ ready-made components — mobile cells, cards, lists, tab bars, desktop windows and controls, web sections, and wireframe blocks. Drag, drop, done. • Every platform on one board — sketch a wireframe, refine the mobile screen, and design the matching website without switching tools. • Real typography — full font, weight, spacing, and color control for text that looks like the real thing, not a placeholder. • Smart guides & measurements — snapping, alignment guides, and pixel distances as you move things around. • Device frames — present your work in phone, tablet, laptop, desktop, and watch frames. • Apple Pencil drawing — sketch and annotate naturally, right next to your mockups. • Layers & precise control — select, lock, reorder, and fine-tune every element. • Crisp vector PDF export — even huge boards export clean, sharp, and print-ready. • iCloud sync — start on the Mac, tweak on the iPad, show it from your iPhone. Free to start with all Basic shapes, icons, text, and drawing tools. Upgrade to Pro to unlock the full component library and device frames. Whether you're a designer, a developer, a founder pitching an idea, or a student sketching your first app, MockApp keeps the whole process in one place — from the first rough wireframe to the PDF you send out. Terms of Use: https://mockapp.studio/terms/
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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.