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.
London For Kids is the perfect travel companion for families exploring one of the world's most exciting cities
$1.99 · 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 London For Kids: map the core Travel 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 activity options for different age groups
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Poor user engagement and retention due to lack of personalization
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Difficulty finding activities on the map
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline access to activities
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.
London For Kids is the perfect travel companion for families exploring one of the world's most exciting cities. Designed for children and their parents, this app turns every landmark into a thrilling adventure. Discover 9 amazing sections of London, each packed with fun stories and fascinating facts: - Royal London: Visit Buckingham Palace and watch the Changing of the Guard, explore the Tower of London where the Crown Jewels are kept, and learn about kings and queens who shaped British history. - Magic Museums: Step into the British Museum to see Egyptian mummies, explore the Natural History Museum with its giant dinosaur skeletons, and discover treasures from around the world. - Animal Adventures: Meet the animals at London Zoo in Regent's Park, learn about marine life at the Sea Life London Aquarium, and discover the city's surprising wildlife. - Parks and Playgrounds: Run through Hyde Park, sail boats on the Serpentine, explore Kensington Gardens where Peter Pan's statue stands, and find the best playgrounds in the city. - Iconic Landmarks: Stand beneath Big Ben, cross Tower Bridge, ride the London Eye for stunning views, and see St Paul's Cathedral where history was made. - Storybook London: Find Platform 9 3/4 at King's Cross Station, visit Paddington Bear's home at Paddington Station, walk in the footsteps of Sherlock Holmes on Baker Street, and explore Shakespeare's Globe Theatre. - Thames Adventures: Cruise along the River Thames, pass under historic bridges, spot landmarks from the water, and learn the stories of the river that shaped London. - Entertaining London: Experience the magic of the West End theatre district, visit the London Transport Museum, and discover the city's most exciting attractions for young visitors. - Markets and Treats: Explore Borough Market's delicious food stalls, wander through Camden Market's colourful shops, taste traditional British treats, and discover London's vibrant food scene. With 66 illustrated pages including detailed descriptions and fun "Did you know?" curiosity cards, your kids will learn while having a wonderful time. Every page comes with audio narration so children can listen to the stories being told. Available in 7 languages: English, Spanish, French, Italian, German, Chinese, and Portuguese. Why families love London For Kids: - Works completely offline. No internet needed, ever. - No advertisements of any kind. - No tracking, no analytics, no data collection. - No in-app purchases. - No external links or social media. - Safe for children to use independently. - Beautiful illustrations for every section and page. - Audio narrations bring every story to life. - Fun curiosity cards with surprising facts. - Available in 7 languages with full translations. Download London For Kids and turn your family trip into an unforgettable learning adventure.
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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.