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.
Tax time is coming again! Will you be ready for it?
$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.
Kit ready. Verify your email to download it.
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.
JavaScript is required to complete mailbox verification.
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Withholding Calc: map the core Finance workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Affiliate link: CloneChart may earn a commission at no extra cost
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: Users often find tax calculation apps confusing and not user-friendly.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of customization options for tax scenarios.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited visual representation of results.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchases can be unclear.
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.
Tax time is coming again! Will you be ready for it? WithholdingCalc is an ad-free estimator for your pay check. Input your pay check gross pay, pre-tax deductions (insurance, 401k, etc.), filing status, state, and withholding allowances from your W-4 and get an estimate of how much of each of your pay checks is going to the government, and how much is going into your pocket. You can see how to optimize your monthly budget and make sure you've had enough taxes held back for tax time! Want to get even more advanced? Switch over to the advanced view and you can enter extra withholding amounts for both Federal and State taxes, and separate filing status and withholding allowance amounts for your state to get an even more accurate picture of your tax withholding. WithholdingCalc lets you easily manipulate the numbers from your W-4 form to help you get an accurate picture of your budget and how much tax withholding you will have accumulated for tax season. WithholdingCalc is based on current 2018 tax rates for most federal and state tax rates for the 41 states that have income tax plus the District of Columbia and Puerto Rico. We will update Withholding Calc as further tax rate changes come in. WithholdingCalc uses an annualized method for computing taxes for most jurisdictions. This means that the total tax withholding that it computes may be slightly different from what your employer computes. Generally the two numbers will agree to within a few cents. If they don't, please use our contact form to let us know and we'll investigate it! With the updates some of the 2018 tax brackets now in place, we'll be adding in some of the features we've been working on, like the option to compute your pay check based on an hourly pay rate (with or without overtime pay), calculations for places where there are local taxes as well as state taxes, and more accurate options for states like Arizona which use flat percentage options for withholding instead of a withholding allowance amount. The 2018 IRS tax brackets aren't available yet, but we'll be adding them as soon as they are. WithholdingCalc is not endorsed by any taxing authority, including the Department of the Treasury or the Internal Revenue Service (They want you to give them too much money :) ).
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.