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
The three_little_pigs
This is a very famous fairy tale, that of the three little pigs
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 1.5
2 ratings · Below Average
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included14 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 The three_little_pigs: map the core Books 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
Add animations or interactive elements to enhance engagement.
Assumption to check: Limited interactivity and engagement for children.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and add clear instructions.
Assumption to check: Poor user reviews indicate frustration with navigation.
Validate with people who use this workflow before building.
Hypothesis 3
Offer more stories and a free trial period.
Assumption to check: High price point for limited content.
Validate with people who use this workflow before building.
Hypothesis 4
Implement customizable font sizes and colors.
Assumption to check: Lack of customization options for text display.
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
This is a very famous fairy tale, that of the three little pigs. Today, thanks to Digital Taps, our three little friends have grown up and they jumped from the pages of a book right into the screen of your iPhone or iPad. Finally, you will be able not only to read and listen to the fairy tale, but also to play and interact with its characters, objects and scenarios. Special features: • Easy and fun to use! • Use your fingers to tap on the screen and play with the characters and objects! • Help the three little pigs escape from the evil wolf! • Use the contextual help tool, and make sure you don’t miss anything • It works on "airplane mode" too • Possibility of turning the voice-over on / off. • Languages: English, French, Spanish, Italian and Portuguese And now ... are you ready to enjoy the magic of Three Little Pig’s 24 exclusive and beautifully illustrated scenes, ready for you to explore and play? Yes you are! Did you like the Three Little Pigs? Then why don’t you download all our apps, they are super fun!
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.
SUGGESTED BUILD STACK
React Native
Expo
Zustand
React Navigation
Expo-AV
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.
