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
Shopper Lite Shopping List
A super easy to use shopping list for weekly and other shopping
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.3
37 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 Shopper Lite Shopping List: 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
Add collaborative features and integrations with grocery stores
Assumption to check: Limited features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Focus on stability and user experience improvements
Assumption to check: Inconsistent performance and bugs
Validate with people who use this workflow before building.
Hypothesis 3
Simplify navigation and enhance UI design
Assumption to check: Cluttered interface
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate recipe suggestions and meal planning features
Assumption to check: Lack of recipe integration
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
A super easy to use shopping list for weekly and other shopping. One of the first apps in the store, now downloaded by millions. What makes Shopper great in a nutshell? Saving you time and money while you shop is all we do. And you will never out-grow Shopper. Shopper has the most extensive set of free features available. And become a Gold user for options available in no other app. See our website for a detailed list of everything you can do. For example, our rock solid, super fast cloud syncing of grocery lists and other shopping lists among your household and friends lets you divide and conquer at Costco and Kroger. Check out the pictures and video below or just download it free now and give it a try. We guarantee you won't be disappointed. Subscription Information: • Shopper Gold Membership Subscription can be purchased from Settings/Purchases, detailed information can be found in the app or by following this link: http://www.myshopperapp.com/gold-features/ • Subscription can be purchased on a monthly bases ($0.99/month) or on a yearly basses ($8.99/year) • Payment will be charged to iTunes Account at confirmation of purchase • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases Gold Membership Check out the Privacy Policy and Terms of use by following the Privacy Policy link ("http://www.myshopperapp.com/legal-1/") or by visiting Developer website ("http://www.myshopperapp.com/") and selecting Support/Legal.
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
Axios
React Navigation
Zustand
Firebase
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.
