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.
Cross-Platform Convenience: Just Calendar seamlessly integrates with your Mac, iPhone, and iPad, providing a consistent and user-friendly calendar experience across all your Apple devices.
$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.
Cross-Platform Convenience: Just Calendar seamlessly integrates with your Mac, iPhone, and iPad, providing a consistent and user-friendly calendar experience across all your Apple devices. Interactive Widget: Say goodbye to the hassle of opening your calendar app just to check the date. With Just Calendar, you can enjoy an interactive widget that allows you to switch between months directly from your home screen. Personalized Color Themes: We understand that everyone has their own style and preferences. Just Calendar offers six vibrant accent colors to choose from, so you can customize your calendar to match your personality or mood. Make your calendar as unique as you are. Week Number Display: Stay organized and plan your weeks effectively with the option to show or hide week numbers. Whether you rely on week numbers for work or simply find them helpful for your personal planning, Just Calendar gives you the flexibility to decide. User-Friendly Design: Just Calendar boasts an intuitive and user-friendly interface that makes managing your schedule a breeze. Whether you're a seasoned calendar pro or just getting started, our app is designed to be accessible and easy to use. Stay Organized, Stay in Control: Just Calendar empowers you to take charge of your schedule and stay organized with ease. Experience the convenience of a cross-platform calendar app that caters to your unique needs.
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.