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.
Explore 3D globes of Saturn's moons
$2.99 · In-app purchases
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.
Rork plan preview for Saturn Atlas: 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: Limited content updates and information depth
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of interactive features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Difficult navigation structure
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High cost for simple content
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.
Explore 3D globes of Saturn's moons Use pinch and finger gestures to manipulate a 3D globe of one of seven of Saturn's moons. As you zoom in more labels appear as finer detail comes into view. You can double tap on the labels to get more information about a particular feature. Saturn Atlas displays the approximate phase, axial tilt and central meridian of the selected moon from your chosen location and time, and renders these on the globe. You can switch to a 'Globe' mode that allows you to spin the moon around to see the whole globe. The feature database is searchable and can move the globe to a searched feature. The phase can be switched off to show the whole globe more clearly. The moon's globe can be shown with north or south at the top or inverted to suit different telescope views. Over 440 named features across seven moons are included. These moons are Dione, Enceladus, Iapetus, Mimas, Rhea, Tethys and Titan. The phase view shows the current view of Saturn itself including the tilt of the rings. You can swipe left and right on the phase view to go backwards and forwards a day. When you turn the device to landscape mode a wider view is shown with the moons in their approximate positions for the time selected. Date, time and location can be changed. There is also a realtime mode that will update to the current time. Atlases for the Moon, Mars, Mercury, Venus and Jupiter are also available on the App Store!
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.