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.
Log your income and expenses in seconds.
$1.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Simple Income Expense Tracker: map the core Business workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Log your income and expenses in seconds. Income & Expense Log is made for freelancers, side hustles and small businesses that just need the basics done right. It's quick to learn and has nothing you'll never use. SCAN RECEIPTS INSTEAD OF TYPING Point your camera at a receipt, or choose a photo or PDF. The app reads the amount, date and merchant and suggests a category. Scan a statement with several charges and you can review them and add them all at once. On devices with Apple Intelligence, it also reads unusual layouts that simple scanners miss. LOG IT IN SECONDS Add income or an expense in a few taps. Save the entries you use often as favorites. Set up recurring ones, like rent, software subscriptions or a monthly retainer, so you don't forget them. CATEGORIES BUILT FOR TAX TIME Advertising, Office Expenses, Home Office, Communication, Legal & Professional and more are built in. You can add your own categories too. SEE WHERE YOU STAND Check your monthly net, compare income with expenses, and see which categories your money went to. WIDGETS ON YOUR HOME SCREEN See this month's balance, check your top spending categories, or start a new entry without opening the app. READY WHEN YOUR ACCOUNTANT ASKS Make monthly and annual PDF reports. Export everything to CSV for Numbers, Excel, Google Sheets or your accountant. ON ALL YOUR DEVICES iCloud keeps your entries in sync across iPhone, iPad, Mac and Apple Vision Pro. You can also export a backup file whenever you like. WHO IT'S NOT FOR If you run payroll, manage inventory, or file taxes for a Fortune 500 company, this isn't your app. If you want a fast, simple record of what came in and what went out, it is.
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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
Assumption to check: Limited categorization for transactions
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No export functionality
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of multi-currency support
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Simplicity may not suit advanced users
Validate with people who use this workflow before building.
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.