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
Checklist Pro: Expense Tracker
Simplify your shopping list budgeting with Checklist Calculator Pro - the ultimate app for effortless expense calculation using a handy checklist format
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.0
2 ratings · Below Average
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 Checklist Pro: Expense 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
Implement custom category creation and management.
Assumption to check: Limited categorization options for transactions.
Validate with people who use this workflow before building.
Hypothesis 2
Use modern design standards and animations to enhance usability.
Assumption to check: User interface feels clunky and outdated.
Validate with people who use this workflow before building.
Hypothesis 3
Create more intuitive budget tracking features with visual progress indicators.
Assumption to check: Difficulty in viewing and managing budgets.
Validate with people who use this workflow before building.
Hypothesis 4
Add comprehensive reports on spending trends and patterns.
Assumption to check: Lack of detailed reports or analytics.
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
Simplify your shopping list budgeting with Checklist Calculator Pro - the ultimate app for effortless expense calculation using a handy checklist format. Whether planning a holiday, organizing shopping lists, or managing incoming payments, this app is your essential tool. Here's how it empowers you: - Create tailored category lists. - Input items and their values. - Track expenses by checking them off. - Visualize progress with a dynamic bar. - Automatically calculate total and remaining expenses. - Sync your lists seamlessly between devices via iCloud. Features that shine: - User-friendly interface for seamless use. - Craft lists for both expenses and incomes to maintain balance. - Customize as per your needs. - Add and edit expenses with a single tap. - Timeline flexibility - create lists per month, week, or personal preference. - Easily add expenses on-the-go, wherever you are. - Split receipts and expenses with ease. - Monitor goals, visualize your remaining balance, and track progress effortlessly. - Mark items as "paid" for clarity. - Enjoy an ad-free experience - dive straight into your budget. Elevate your shopping list management with Checklist Calculator Pro.
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 Navigation
react-native-paper
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.
