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
AB Glycemic Index
Want to quickly understand how food affects your blood sugar levels? AB Glycemic Index is a convenient reference book on the glycemic index (GI) of foods
$8.99 · In-app purchases
PRICE
$8.99
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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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 AB Glycemic Index: map the core Food & Drink 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
Expand food database with user contributions and community input.
Assumption to check: Limited variety of food data
Validate with people who use this workflow before building.
Hypothesis 2
Implement a recommendation engine based on user preferences.
Assumption to check: Lack of personalized recommendations
Validate with people who use this workflow before building.
Hypothesis 3
Add social sharing options for users to share their favorite foods.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a subscription model for more flexible payment options.
Assumption to check: High one-time purchase cost
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
Want to quickly understand how food affects your blood sugar levels? AB Glycemic Index is a convenient reference book on the glycemic index (GI) of foods. Open the app, find the name of the product and immediately see how quickly it increases glucose — with a clear label: low, medium or high GI. What you will get • 600 foods with verified GI values. • All categories: cereals, fruits, vegetables, dairy, sweets, etc. • Offline access: the entire database is always at hand — without the Internet and registration. • Regular updates of the database with new products. Who will benefit from Those who monitor their diet: when monitoring weight, sports and consciously choosing carbohydrates. The app does not replace a doctor, but it helps make informed decisions every day. Why AB Glycemic Index • Simple and fast: no extra screens or ads. • Clear on one screen: GI, color indication and categories. • Focused on the essentials: only the glycemic index - no overload. Important The application is for informational purposes only and is not a medical recommendation. For questions about treatment and nutrition, consult your doctor.
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.
