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
Coupert: Coupons & Cash Back
Coupert is a free shopping assistant trusted by over 8 million users worldwide
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
24,918 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 included18 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 Coupert: Coupons & Cash Back: 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 a feature to automatically apply the best coupon at checkout.
Assumption to check: Users find it hard to manage multiple coupon codes effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize the loading process with caching and pre-fetching strategies.
Assumption to check: The app can be slow when loading coupons.
Validate with people who use this workflow before building.
Hypothesis 3
Offer more advanced filtering options based on categories, expiration dates, and store ratings.
Assumption to check: Limited filtering options for coupons.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate a live chat feature for real-time support.
Assumption to check: Inadequate customer support when issues arise.
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
Coupert is a free shopping assistant trusted by over 8 million users worldwide. On average, users save $600 per year by automatically finding coupons and earning cashback while shopping online. With our Max-Savings Guarantee™, faster cashback processing, and transparent price comparison tools, Coupert is designed to help you shop with more confidence and less effort. Why Choose Coupert? Max-Savings Guarantee™ Coupert automatically tests available coupon codes at checkout across 200,000+ stores to help you find the best available discount. Our system continuously checks for updated codes so you don’t miss potential savings. Faster Cashback & Rewards Earn up to 40% cashback on eligible purchases. Coupert offers streamlined reward processing so you can access your cashback sooner. Redeem through PayPal or popular gift cards. Clear Price Comparison & Tracking Compare prices across stores, review price history, and receive real-time alerts when prices drop. Make informed decisions before you buy. Mobile & Desktop Sync Use Coupert across mobile and desktop for a seamless shopping experience wherever you shop. Join 8M+ users who trust Coupert to: • Save an average of $600 per year • Access exclusive coupons and cashback offers • Shop at major online retailers including ASOS, Target, Nike, Apple, and more • Enjoy a secure, privacy-first experience Download Coupert today and start saving automatically. Privacy & Security Coupert only activates on supported shopping sites and never sells your personal data. Cashback rates and redemption options vary by merchant. Terms apply. Data reflects internal platform information as of Q2 2026.
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
Supabase
Zustand
react-native-reanimated
expo-router
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.
