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
Greencart – Buy Sustainable
Greencart recognizes your sustainable purchases, earning rewards for every green choice for you and the planet.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
42 ratings · Top 5%
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 included15 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 Greencart – Buy Sustainable: map the core Shopping 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
Focus on niche eco-friendly products to attract a dedicated audience.
Assumption to check: Limited product variety compared to larger platforms
Validate with people who use this workflow before building.
Hypothesis 2
Implement a guided tour or onboarding process to improve user experience.
Assumption to check: In-app navigation can be confusing for new users
Validate with people who use this workflow before building.
Hypothesis 3
Optimize images and use caching strategies to enhance performance.
Assumption to check: Slow loading times for images and product details
Validate with people who use this workflow before building.
Hypothesis 4
Encourage user-generated content and detailed descriptions for all products.
Assumption to check: Lack of detailed product information and reviews
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
Greencart recognizes your sustainable purchases, earning rewards for every green choice for you and the planet. What is Greencart? Greencart is an innovative app that transforms your daily grocery shopping into concrete actions for a more sustainable future. By choosing eco-friendly and sustainably sourced products (i.e., fruits, vegetables, vegan, and organic foods), you can earn real rewards and make a positive impact for the environment. Greencart offers you a secure, transparent, and cutting-edge platform that recognizes your eco-friendly choices. How does Greencart work? SHOP – Shop anywhere in the world, whether at your favorite supermarket or natural food stores. Buy eco-friendly products, from organic fruits and vegetables to delicious plant-based foods. SCAN – Take a photo of your receipt and upload it through our app. Our AI system will quickly, easily, and sustainably analyze your purchases. EARN – The more eco-friendly choices you make, the more rewards you earn. Each eligible purchase allows you to receive B3TR tokens. Why choose Greencart? Reward your eco-conscious habits: every daily purchase becomes an opportunity to earn rewards that support a sustainable lifestyle, doing good for both you and the planet. Global impact, local change: actively contribute to the fight against climate change by reducing your ecological footprint, one receipt at a time. Exclusive benefits: with Greencart, you earn B3TR tokens for every responsible purchase you make, anywhere in the world. Completely free and easy to use: Greencart is totally free and simple to use. We will never ask for your credit card information, bank account details, or any ID documents. Sign up today and start earning rewards for every sustainable purchase you make! A united and transparent community: join a global network of individuals committed to shaping a greener future through responsible consumption. Greencart offers you a secure and transparent platform where every eco-friendly choice is rewarded and valued. Your participation becomes a direct contribution to create a more sustainable world. Start using Greencart today and turn every purchase into a step toward a cleaner, more sustainable world. Earn rewards for every eco-friendly choice you make and help build a better future for the planet. Subscriptions terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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
Axios
React Navigation
BUILD KIT DIFFICULTY
Advanced
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.
