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.
App Overview
Little Hospital For Kids
EXPLORE A HOSPITAL
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
262 ratings · Top 30%
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Little Hospital For Kids: map the core Entertainment workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Introduce new characters and activities regularly to keep users engaged.
Assumption to check: Limited content variety leads to quick user fatigue.
Validate with people who use this workflow before building.
Hypothesis 2
Offer more free content or trials for premium features.
Assumption to check: In-app purchases can frustrate users.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify navigation and prioritize features.
Assumption to check: User interface can feel cluttered with too many options.
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate learning aspects within the gameplay.
Assumption to check: Lack of educational elements in activities.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
EXPLORE A HOSPITAL Meet doctors, nurses, dentists and florists. Try out the X-ray machine to see what lies within! Put the peddle to the metal driving an ambulance through town! Help out your fellow kids with their injuries after a skateboarding accident. DISCOVER & EXPLORE In Little Hospital, kids can discover a busy medical center full of surprises and fun! From the reception to the operating room, this app encourages your child to explore! Little Hospital is a colorful and fun hidden object game optimized for kids. It is all about exploration and discovery: the kids can move freely from one room to another, experiencing the app in their own time. Each room in the hospital has animations and fun little games like coloring and puzzles. PERFECT FOR KIDS The controls are extremely simple: Tap to interact with an object, swipe to navigate into another scene. Expertily designed with your child in mind, navigating through the app is seemless for any child. Highlights: - Simple controls optimized for kids age 3 - 5 - 5 unique rooms with exciting items to search for - 2 mini games - An ambulance with different rescue missions - Collectables and missions to guarantee hours of fun - Great characters and hilarious, surprising animations - Original artwork and music - No internet or WiFI needed - Play wherever and whenever! DISCOVER, PLAY, LEARN Our dream is to introduce children to the digital world in a playful and gentle way. Our goal is to open up a new, exciting world to them that encourages play, curiosity and learning. With our apps, kids are able to step into different shoes, go on adventures and set their creativity free. Little Hospital is handcrafted with love in Berlin, Germany. About Fox & Sheep: We are a Studio in Berlin and develop high quality apps for kids at the age of 2-8 years. We are parents ourselves and work passionately and with a lot of commitment on our products. We work with the best illustrators and animators around the world to create and present the best apps possible – to enrich the lives of our and your kids.
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
React Navigation
Zustand
React Native Reanimated
Axios
BUILD KIT DIFFICULTY
Intermediate
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.
