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.
Do you know if you can retire early? Do you know if your current savings plans are enough? Do you need to put more money into your 401k each year?
$0.99 · 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 Easy Retirement Calculator: 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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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 functionality and features compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: User interface is basic and lacks modern design.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchase process can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited support for different currencies and financial contexts.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Do you know if you can retire early? Do you know if your current savings plans are enough? Do you need to put more money into your 401k each year? This Easy Retirement Calculator keeps it simple for easy high-level planning and comparing different scenarios. (How much more would you have at retirement if you increase your savings, or if your investments make higher interest?) This application is about giving you the tools you need to estimate your retirement years. The calculator lists the assumptions on the front page, and lets you pick your own options This retirement calculator takes inflation fully into account. Many similar calculators ignore inflation, which is a grave mistake. Even assuming a modest inflation rate of 3%, $100 today will only have the purchasing power of $55, 20 years from now. It is extremely important to take inflation into account when planning for retirement. This app lets you make all the decisions: Choose your current age and age of planned retirement Choose the rate of inflation (defaulted to the standard 3%) Choose the rate of return on your investments. You are able to calculate different rates of return on different investments, if desired. Choose your current Savings and 401k balances Choose how much you plan to add to your savings accounts each year. This will be automatically indexed to the rate of inflation. Choose your life expectancy age or "end of retirement" date to see how much you would be able to spend each year of retirement OR Choose the spending amount you need to maintain your desired standard of living, and see how many years your nest egg would last. This application lets YOU make the choices regarding inflation and rate of return / interest rate. A small change in these rates can have a drastic effect on projected income. With this app, YOU get to make that choice. All rates are defaulted at startup to fairly standard rates. Save your various retirement scenarios for later retrieval, and to compare against each other. This application is Ad-free. It does not try to sell you financial services, or attempt to persuade you to invest in any particular stocks or bonds. Disclaimer: This application is a calculator using your assumptions and input. It does not provide financial advice. Please contact a licensed financial planner for specific retirement advice.
Written user reviews are not shown here. Check current App Store reviews >
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.