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
GreenExpenseTracker
Super Expense - Smart Expense Tracker with Multi-Currency Receipt Scanning
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 GreenExpenseTracker: map the core Finance 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 automatic transaction categorization.
Assumption to check: Users often find expense tracking tedious.
Validate with people who use this workflow before building.
Hypothesis 2
Add bank linking for automatic transaction import.
Assumption to check: Users dislike manually entering transactions.
Validate with people who use this workflow before building.
Hypothesis 3
Provide visual progress indicators for budgets.
Assumption to check: Budget tracking can be unclear.
Validate with people who use this workflow before building.
Hypothesis 4
Implement reminders for upcoming bills.
Assumption to check: Lack of notifications for bills.
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
Super Expense - Smart Expense Tracker with Multi-Currency Receipt Scanning The ultimate privacy-first expense tracker for iPhone. Super Expense combines powerful receipt scanning with intelligent multi-currency support to make expense tracking effortless and accurate. Key Features: Smart Receipt Scanning - Advanced OCR that automatically extracts amounts, dates, and merchant information Multi-Currency Support - Works with USD, EUR, GBP, JPY, CAD, AUD, and INR with region-specific accuracy Intelligent Currency Recognition - Automatically adapts to your selected currency and regional formats Easy Budget Management - Set budgets by category and track spending with beautiful visual charts Powerful Reports - Generate PDF and CSV reports instantly for your records or taxes Privacy-First - All data stays on your device. No accounts, no cloud, no tracking One-Time Purchase - No subscriptions. Pay once, use forever with Family Sharing support Works Offline - No internet required. Your data is always accessible Perfect for: Business professionals tracking expenses Travellers managing multiple currencies Individuals wanting better financial control Anyone who wants accurate receipt scanning without privacy concerns Download Super Expense today and experience the future of expense tracking! - superexpense.com
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
react-navigation
BUILD KIT DIFFICULTY
Starter
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.
