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
ShopBack: Cashback & Rewards
Shop smarter and save more with ShopBack, the free cash back and rewards app
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
1,796 ratings · Top 15%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included18 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 ShopBack: Cashback & Rewards: 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
Include more partnerships and exclusive offers.
Assumption to check: Limited cashback options compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and enhance onboarding tutorials.
Assumption to check: User interface can be confusing for new users.
Validate with people who use this workflow before building.
Hypothesis 3
Implement in-app chat support for faster resolutions.
Assumption to check: Slow customer support response times.
Validate with people who use this workflow before building.
Hypothesis 4
Ensure timely and relevant notifications for offers.
Assumption to check: Inconsistent push notifications.
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 smarter and save more with ShopBack, the free cash back and rewards app. Earn real Cashback at thousands of stores, find coupon codes and the best deals, and get paid back on everything you buy. Tired of leaving money on the table when you shop? Start at ShopBack and stack your savings with sales, coupon codes, and credit card rewards across thousands of stores. Cashback is tracked automatically and ready to withdraw once your purchase is verified. Pro tip: Install the ShopBack browser extension on Chrome and shop as usual. It finds the best Cashback deals and discount codes with a single click. How to Unlock extra rewards? Complete limited-time quests to earn bonus Cashback and save even more. What is Cashback, and where does the money come from? When you shop through ShopBack, stores pay us a commission for sending you their way, and we share that money back with you as Cashback. Real money, on purchases you were already making. How to get Cashback: 1. Sign up for a free ShopBack account and browse on the app, website, or browser extension. 2. Click through ShopBack to the store, shop, and pay as you normally would. 3. Watch your Cashback get tracked, then withdraw it via PayPal or your bank account. Join over 45 million shoppers worldwide who are already getting paid to shop. Website: https://www.shopback.com Email: [email protected]
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
Redux
Axios
react-navigation
react-native-async-storage
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.
