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
Cholesterol Food Reference
The perfect reference app for people looking to lower their cholesterol.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.1
13 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.
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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 Cholesterol Food Reference: map the core Health & Fitness 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
Enhance database with more food entries and detailed nutrition facts.
Assumption to check: Limited food database
Validate with people who use this workflow before building.
Hypothesis 2
Focus on improving user interface and user experience.
Assumption to check: 3.1/5 rating suggests usability issues
Validate with people who use this workflow before building.
Hypothesis 3
Provide clear explanations of what premium options offer.
Assumption to check: In-app purchases may confuse users
Validate with people who use this workflow before building.
Hypothesis 4
Introduce social sharing and user challenges to boost engagement.
Assumption to check: Lack of community features
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 perfect reference app for people looking to lower their cholesterol. ***** "Cholesterol Food Reference is a little more serious and to me, worth the asking price." - Larry Greenemeier, Scientific American ***** Finding out the cholesterol values of food is never easy. Most groceries don't come with labels and fast food restaurants do their best to hide it from you. Cholesterol Food Reference will help you identify the cholesterol values of some of the most common everyday foods, including fast foods and groceries you buy at the supermarket. Bring this app anywhere and never have to worry about the cholesterol values in food again. • Over 200 common groceries that contains cholesterol & over 100 fast foods. • Over 50 of the most popular desserts & sweets. • 300+ photos to help you identity foods. • No online connection required. All photos are stored in the app. • 'Learn More' section to help you understand cholesterol. • Email or tweet the nutritional information of any food. • Supports iOS 7. It's time to stop looking up foods on Google. This app is all you need.
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
Supabase
Zustand
React Navigation
react-native-paper
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.
