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
ExpensePad: Spending Tracker
Keep track of all your expenses and have peace of mind.
$3.99 · In-app purchases
PRICE
$3.99
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/
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 ExpensePad: Spending Tracker: 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
Focus on user feedback mechanisms and testimonials.
Assumption to check: Lack of user feedback or reviews for credibility
Validate with people who use this workflow before building.
Hypothesis 2
Implement automatic transaction categorization from linked accounts.
Assumption to check: Manual transaction entry can be tedious
Validate with people who use this workflow before building.
Hypothesis 3
Add analytics and trends features to visualize spending behavior.
Assumption to check: Limited insights into spending patterns
Validate with people who use this workflow before building.
Hypothesis 4
Offer a robust free trial to demonstrate value before purchase.
Assumption to check: Subscription model may deter users
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
Keep track of all your expenses and have peace of mind. EXPENSE MANAGEMENT: • Track your daily expenses effortlessly with multi-currency support. • Use iCloud to have your expenses synced across all your devices. • Filter by category or search your transactions by description, place, or online store name. AUTOFILL: • Connect it with a Wallet Tap automation in the Shortcuts app to automatically register expenses in the app. • Log expenses easily by pasting a description from your clipboard. • Detect common expense names and add icons automatically. SHEETS: • Tag your transactions to a custom sheet • Assign a color to your sheets to get a visual indicator for your transactions. • Use the top menu to filter the transactions of a sheet. STATS: • Quickly view your monthly spending patterns without opening the app. • View your expenses by category at a glance with charts. • See your total spent per category. CLEAN USER INTERFACE: • Enjoy a modern, clean, and easy-to-use interface. • View the locations of your purchases on a map. • Support for Dark Mode.
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 Navigation
Zustand
Victory Native
Axios
Expo
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.
