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
FinanceSimple
FinanceSimple helps you track and understand your money in a simple, private, and local way
$0.99
PRICE
$0.99
No 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/
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 FinanceSimple: 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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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
FinanceSimple helps you track and understand your money in a simple, private, and local way. Manage your income, expenses, payments, debts, budgets, and savings directly from your device, without creating an account and without relying on an internet connection. With FinanceSimple, you can: -Track income and expenses by date, category, and amount. -View your monthly balance and available money for the month. -Keep track of recurring and upcoming payments. -Organize your banks, cards, and credits for better financial context. -Track debts: what you owe and what others owe you. -Create budgets to better control your spending. -Save money and view your historical savings progress. -Export and import a local backup in JSON format. Privacy first: Your information is stored only on your device. The app does not require an account, does not connect to banks, does not process real payments, and does not send your financial data to external servers. Disclaimer: FinanceSimple is a personal finance organizer. It does not offer loans, investment services, trading, or financial advice.
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
Implement smarter categorization with AI suggestions.
Assumption to check: Limited transaction categorization options
Validate with people who use this workflow before building.
Hypothesis 2
Add budget tracking with visual progress indicators.
Assumption to check: No budget tracking features
Validate with people who use this workflow before building.
Hypothesis 3
Introduce recurring transactions for better expense management.
Assumption to check: Lack of recurring transactions management
Validate with people who use this workflow before building.
Hypothesis 4
Enable users to export their financial data in various formats.
Assumption to check: No data export 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.
SUGGESTED BUILD STACK
React Native
Expo
Supabase
@react-navigation/native
Zustand
react-native-gesture-handler
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.
