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
Instacart: Groceries & Food
Shop online & get your groceries delivered directly to your door in as fast as 30 minutes
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
4,796,202 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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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 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 Instacart: Groceries & Food: 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 delivery zones and highlight them.
Assumption to check: Limited delivery areas may frustrate users.
Validate with people who use this workflow before building.
Hypothesis 2
Implement in-app chat support for quicker resolutions.
Assumption to check: Slow customer support response times.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize app performance and server capacity.
Assumption to check: Frequent app crashes during high traffic.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify user onboarding and provide guided tours.
Assumption to check: Complicated navigation 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
Shop online & get your groceries delivered directly to your door in as fast as 30 minutes. And it's safe—contactless delivery is available. Instacart delivers fresh food, drinks, and household items the same day all across the US. Download the app to see what stores are available in your zip code. Prefer to pickup? Order online and pickup at your local store, where it will be waiting for you when you arrive. Ordering made easy 1. Enter your zip code 2. Shop stores for groceries, household items, electronics, and more 3. Add your items to your cart and place your order 4. Chat with your shopper in real time to make any changes to your order 5. Relax while you you wait for your delivery to arrive 6. Enjoy your items while you save time & money Contactless delivery Order safely from your home and get your groceries delivered to you same day. Our 100% contactless delivery helps to ensure you and your shopper stay safe. Find your favorite products Get fresh produce, late-night snacks, and even drinks delivered to your door. Don’t forget essentials like toilet paper, other household items! And your shopper will ensure that fragile items like eggs and glass bottles are always handled with care. With Instacart, you can: • Find exclusive deals & coupons • Creating shopping lists • Reorder your favorite products • View nutritional information & filter by diet Where to shop with Instacart Shop from your favorite stores - Aldi, Publix, Costco, Safeway, Wegmans - and nearly 40,000 other retail locations across North America. Download to see what stores are available in your zip code. Terms and conditions apply. See details: https://www.instacart.com/help/section/360007996832
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 Navigation
Axios
Supabase
React Native Paper
Expo Location
BUILD KIT DIFFICULTY
Expert
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.
