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.
See history come alive on a dynamic, interactive world map
$9.99 · 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 Historical 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 depth of content on certain historical events
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Navigation can be confusing in larger timelines
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of offline access to content
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchases may deter users
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.
See history come alive on a dynamic, interactive world map. Watch empires rise and fall, borders shift, and civilizations evolve — year by year, place by place. Understand history visually, not just by reading. Explore 5,000 years of human story: • Track empires, kingdoms, and nations through their rise and collapse • Follow legendary wars, conquests, and colonial expansions across the globe • Jump instantly to any year from 3000 BC to 1900 AD • Discover forgotten civilizations and under-told stories from every continent EPIC JOURNEYS & WARS THAT CHANGED HISTORY • First, Second & Third Punic Wars — Rome’s rise to dominate the Mediterranean • Hannibal’s Alps crossing — the campaign that nearly destroyed Rome • Great Northern War — Sweden’s fall and Russia’s arrival as a major power • The Dutch War — Louis XIV’s ambition that reshaped Europe • Battle of Tsushima — Japan’s emergence as a modern world power • Zheng He’s treasure fleets across the Indian Ocean • Vasco da Gama’s sea route to India • Magellan’s historic circumnavigation of the globe • Alexander the Great’s world-changing conquests • Hadrian’s Wall & Antonine Wall — Rome’s northern frontiers • Goryeo and Iranian defensive walls against nomadic invasions • Jin Dynasty fortifications against steppe powers • French colonial rule in Indochina • The Duke of Aquitaine and medieval European power struggles CIVILIZATIONS & KINGDOMS: RISE AND FALL • The powerful Duchy of Normandy and its far-reaching legacy • Russia’s expansion into Siberia and its impact on native peoples • The founding of the United States — revolution, opportunity, and westward expansion • Republic of Texas — the famous Lone Star Republic • Qing Dynasty, Mongol Empire, Western Liao, and Dzungar Khanate • The Ryukyu Kingdom, Vandal Kingdom, and Inca Empire • Oghuz tribes, Sriwijaya maritime empire, and Shaybanid dynasty • Champa, Post‑Baekje, Republic of Ezo, and Sultanate of Rum • Endless more civilizations waiting for you to explore INTERACTIVE MAP FEATURES • Smooth timeline slider from 3000 BC to 1900 AD • Animated borders, routes, marches, and military campaigns • Clean, easy-to-use design for iPhone & iPad • Zoom, pan, and jump to any region instantly COMING SOON • Modern history from 1900 to today • More detailed battle maps and war narratives • Deeper regional coverage worldwide Discover the past like never before. Download now and explore 5,000 years of world history at your fingertips.
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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.
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.