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.
MindCards is a fully offline, hierarchical note-taking app that helps
$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.
Your first Build Kit is free with a verified email.
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.
MindCards is a fully offline, hierarchical note-taking app that helps you organize ideas as cards in a parent-child tree — up to 5 levels deep. Write in Markdown, navigate with simple gestures, and see the structure of your thinking at a glance. KEY FEATURES • Hierarchical Cards — Organize notes in a tree up to 5 levels deep, with a unique color for each level • Markdown Writing — Headings, bold, italic, striketh, lists, quotes, inline code, and more, with a handy formatting toolbar • Effortless Navigation — Swipe up or down to move between sibling cards; tap the colored level track to jump to any level instantly • Branch Drawer — A slide-out panel shows the full branch tree of your current path, so you never get lost • Structure View — Generate a bird's-eye outline of any card tree and export it as a PDF • Local Backup — Export and import your entire library as a standard JSON file, making it easy to migrate and restore data across devices • Thoughtful Details — Cascade deletion with confirmation, an interactive welcome guide, font size, and more PRIVATE BY DESIGN MindCards works 100% offline. No account, no sign-up, no subscriptions, no ads, and no analytics. Your notes are stored only on your device and never leave it without your explicit action. Whether you're planning a trip, structuring an article, organizing study notes, or capturing a flash of inspiration, MindCards keeps your ideas clear, layered, and always within reach.
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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.
Not assessed in a Build Kit yet.
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.