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
WinStamp Business
Customer Loyalty Program: Simple
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
557 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 WinStamp Business: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Customer Loyalty Program: Simple. Fast. Affordable Digitize Your Loyalty Program with WinStamp WinStamp offers an eco-friendly, user-friendly and easy-to-implement customer loyalty solution for small businesses. Start your digital loyalty program in minutes. How It Works in 3 Steps? 1. Business Owner: Downloads the “WinStamp Business” app. 2. Customer: Downloads the “WinStamp” app and generates a unique QR code. 3. Stamp Process: The business owner scans the customer’s QR code to add a digital stamp. Key Features: - Customizable Stamp Cards: Set the number of stamps, card color and your stamp image. - Customer Management: Quickly access detailed customer information. - Bulk Messaging: Easily send messages to your customers. - Live Stats: Track your daily, weekly and monthly performance. Why WinStamp? - Fast Setup: Get started in minutes without waiting for the approval process. - Customer Friendly: No registration information requested from your customers. - Secure System: Stamps are only added through the business app. - Fully Mobile: No extra devices or hardware needed - just your phone. - Affordable Pricing: Flexible pricing according to the number of your branches. No limit on the number of stamps or customers. You can contact us if you have any questions. We are constantly improving our application in line with your requests. Say goodbye to paper and plastic loyalty cards with WinStamp! Terms of Service: winstamp.com/terms Privacy Policy: winstamp.com/privacy Customer Service: [email protected]
Written user reviews are not shown here. Check current App Store reviews >
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
Allow users to personalize rewards and notifications.
Assumption to check: Limited user customization options for rewards
Validate with people who use this workflow before building.
Hypothesis 2
Optimize backend queries for faster data retrieval.
Assumption to check: Inconsistent loading times during peak usage
Validate with people who use this workflow before building.
Hypothesis 3
Implement real-time tracking updates and notifications.
Assumption to check: Difficulty in tracking order statuses
Validate with people who use this workflow before building.
Hypothesis 4
Integrate multiple payment gateways including Apple Pay and Google Pay.
Assumption to check: Limited payment options
Validate with people who use this workflow before building.
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.
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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.
