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
BJs Wholesale Club
The BJ’s app has everything you need to make the most of your membership
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
1,036,978 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 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 BJs Wholesale Club: 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
Implement advanced search filters and autocomplete features.
Assumption to check: Limited product search functionality
Validate with people who use this workflow before building.
Hypothesis 2
Optimize images and use lazy loading for better performance.
Assumption to check: Slow loading times during peak usage
Validate with people who use this workflow before building.
Hypothesis 3
Simplify layout and improve navigation for a cleaner experience.
Assumption to check: Cluttered user interface
Validate with people who use this workflow before building.
Hypothesis 4
Integrate a recommendation engine based on user behavior.
Assumption to check: Lack of personalized recommendations
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 BJ’s app has everything you need to make the most of your membership. Enter In-Club Mode when you visit a Club to access that location’s helpful mobile features. Add to card coupons - Browse and add coupons directly to your membership card (no scissors required). Your clipped savings will be applied automatically at checkout. BJ's Gas® - Check BJ's Gas regular and premium gas prices for any location -- so you can pump up the savings and fill up for less. Find a club - Get directions, club hours, club features, BJ’s Tire Center® hours and BJ’s Optical Department® information for the club nearest you. Deli Pre-Order - Pre-order BJ’s deli items and platters straight from the app. (Available in select clubs only.) Curbside Pickup - Let us do the shopping for you. Place an order for pickup in just 2 hours.* ExpressPay® - No need to wait in a checkout line. Easily shop, scan your item’s barcode, pay within the app, and go! (Available in select clubs only.) BJ’s Same-Day Delivery - Get same-day grocery delivery on select items in as little as 2 hours. Access membership information - One-click access to all your membership details, rewards, order history, or scan your membership card. *Orders placed 2 hours prior to club closing or later will be available our next business day. Visit BJs.com/PickUp for details.
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
Zustand
Supabase
React Navigation
React Native Reanimated
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.
