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.
The history of the United States taught in most schools follows a reliable arc: the battles won, the documents signed, the speeches given
$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 The Experiment: US History: 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 engagement with content, as users may not return after initial use.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulty in finding specific articles due to lack of advanced filtering.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Users might find the paywall frustrating if they can't preview content.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No social sharing options can limit exposure.
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 history of the United States taught in most schools follows a reliable arc: the battles won, the documents signed, the speeches given. It's not wrong. But the highlight reel skips the parts that are harder to explain - the thousands of people who died on prison ships nobody remembers, the mass smallpox inoculation Washington ran in secret while his army was vulnerable, the spy who helped win the Revolutionary War and then spent six years fighting for his own freedom afterward. This app is interested in that texture. 150+ timeline entries across 12 chapters of American history, from the birth of the republic to 1976. History requires distance - not because recent events don't matter, but because without it, context collapses into argument. The facts, left unedited, are strange and hard and worth knowing. More than 30,000 words of documented American history. No filler. What's included: - Primary source images from the Library of Congress and National Archives - Document Library: 32 original documents, declassified files, and primary source transcripts - Flag history: every significant version of the American flag, documented - All 50 states: admission dates, capitals, and one thing most people don't know about each - Reader Mode: distraction-free reading. Save your place with a bookmark Everything in this app is documented and verified. None of it is for a test.
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.