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.
That crater catching your eye has a name
$4.99
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.
Rork plan preview for The Lunartic: map the core Reference 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: Expensive subscription
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Missing features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Poor performance
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.
That crater catching your eye has a name. That dark plain has a story. Get to know the Moon with The Lunartic. Turn a familiar sight into a world you can explore. The Lunartic brings together a detailed interactive lunar atlas, observing information, and the freedom to move through time—whether you’re beside a telescope or following your curiosity from the couch. Find your next “I never noticed that.” Zoom into the lunar landscape, identify features directly on the map, or search for a landmark by name. Explore craters, mountains, and lunar seas. Locate the Apollo landing sites and connect the Moon you see tonight with the places where history happened. Make the view through your telescope make sense. Flip and mirror the atlas to match your eyepiece. Show the boundary between lunar day and night, or add a latitude and longitude grid to find your bearings. Spend more of your observing time exploring the landscape. Let the Moon move on your schedule. Choose a date and time, step forward or backward, or play through the Moon’s changing appearance. Follow the shifting daylight and the subtle lunar wobble called libration. Preview an upcoming night, revisit a memorable observation, then return to now. Know more before you step outside. Set your observing location to see a view calculated for your position on Earth. Check the Moon’s phase, illumination, rise and set times, altitude, and more. Bring context to tonight’s view and curiosity to your next observing session. Explore with science behind the scenery. The Lunartic combines surface maps derived from Lunar Reconnaissance Orbiter imagery and elevation data with JPL lunar ephemeris data. There’s substance behind the beauty, with detailed information ready when you want to go deeper. You don’t need to know the names before you begin. Just bring the desire to find out. Your next favorite place might be on the Moon.
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.
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.