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
プランドプーリング計算シミュレーター
The Planned Pooling Calculator Simulator is an iOS app designed to make patterned knitting with colorful variegated and gradient yarns even more fun and beautiful.
$0.49 · In-app purchases
PRICE
$0.49
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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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Combine features and design from your favorite apps.
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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 プランドプーリング計算シミュレーター: map the core Lifestyle 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
Provide an educational section explaining results.
Assumption to check: Lack of detailed results interpretation for users
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to save custom settings.
Assumption to check: Limited customization options for calculations
Validate with people who use this workflow before building.
Hypothesis 3
Implement a cloud sync feature.
Assumption to check: No backup or restore function for user data
Validate with people who use this workflow before building.
Hypothesis 4
Create a guided tutorial for first-time users.
Assumption to check: Weak onboarding experience for new users
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
The Planned Pooling Calculator Simulator is an iOS app designed to make patterned knitting with colorful variegated and gradient yarns even more fun and beautiful. Planned pooling is a knitting technique where you intentionally control the color transitions in yarn to create specific patterns. However, imagining the final design manually can be difficult, often requiring many attempts and adjustments... With this app, you can simulate patterns in real time simply by setting colors and the number of stitches. You can preview how the colors will be arranged within the grid of stitches in advance, greatly reducing the effort needed for swatching. Features: - Freely add and rearrange color segments (color + number of stitches) - Select any color using a color picker - Adjust the number of columns and rows with increment and decrement buttons - Zoom and scroll to view the completed design in detail - Supports back-and-forth (zigzag) layout according to knitting charts - Fully offline operation for complete privacy and peace of mind Recommended for: - Beginners who want to try planned pooling - Those who want to visualize patterns while browsing yarns at a yarn store - Knitters who want to reduce swatching and enjoy more creative knitting What kind of pattern will emerge next? Discover your own beautiful knitting patterns with the Planned Pooling Simulator.
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
TypeScript
axios
@react-navigation/native
react-native-paper
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.
