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
Egg Head: Peekaboo Baby Fun
Fuel your child's imagination with larger than life 'Egg Heads', designed to delight with their quirky smiles and charming sounds
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
1,994 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/
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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 Egg Head: Peekaboo Baby Fun: map the core Education 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 more diverse educational games catering to various age ranges.
Assumption to check: Limited game variety for different age groups
Validate with people who use this workflow before building.
Hypothesis 2
Enable users to create and share their own games or activities.
Assumption to check: Lack of user-generated content
Validate with people who use this workflow before building.
Hypothesis 3
Implement clearer communication about what users get with purchases.
Assumption to check: In-app purchase confusion
Validate with people who use this workflow before building.
Hypothesis 4
Add more detailed progress tracking and reports for parents.
Assumption to check: Limited progress tracking
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
Fuel your child's imagination with larger than life 'Egg Heads', designed to delight with their quirky smiles and charming sounds. With a simple tap of the screen, simple, colorful eggs are transformed into vibrant, larger than life 'egg heads' before your child's eyes. They'll meet a sunny rooster, a busy bee, and sniffy skunk and most importantly, a hoppy easter bunny. Let them guess which animal might appear. Work with your child to learn the names and sounds of each animal they discover. Or let them play by themselves and make their own discovery. There's also a 'baby mode' for the very little ones that will allow them just to watch, learn and laugh. Features: • Kid-friendly interface - simply touch the screen to reveal the animals. Even children under 1 can enjoy the fun. • A friendly child's voice announces the name of each animal • Over 20 different eggs - each with its own surprise • Modern graphics - appealing to children and parents • A fully-designed experience - rich visuals • Support for Retina iPad and iPhone • Fresh soundtrack with authentic animal, narrative and sounds • A 'Movie Mode' that allows your baby to simply watch Disclosures: This app DOES NOT feature in-app purchases This app DOES NOT contain any advertising This app DOES NOT report any personally identifiable user data This app DOES contain a link to our other age appropriate apps.
Written user reviews are not shown here. Check current App Store reviews >
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.
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BUILD KIT DIFFICULTY
Starter
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.
