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.
iLoan Calc is a loan simulator application where you can setup your own details.
$3.99 · 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 iLoan Calc (Loan 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 customization options for loan parameters
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No cloud sync for user data
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User interface could be more modern
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of detailed amortization information
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.
iLoan Calc is a loan simulator application where you can setup your own details. You can calculate not only your mortgage but also your car loan or other loans. [Simple user interface] It's very simple to use. You can see your loan to be setting up 4 basic entries: Total loan amount, Interest rate, Term and Payment method. [Detail settings] Detail can be added as needed. For example, bonus payment, accelerated repayment and so on. [Loan simulation] iLoan Calc calculate your loan exactly. If both the repayment start date and the borrowing date are set, daily interest is calculated. [Comparison] You can compare between loans with different settings. Moreover, the comparison with/without accelerated repayment is also available. This allows you to check the effect of accelerated repayment easily. [Main features] - Calculation of each amount: - monthly payment - bonus payment - yearly payment - total payment - total interest - percentage of interest allocation, etc. - Show the amortization schedule, export as a CSV file. - Show graphs (historical graph, comparison graph) - Comparison: - compare with/without accelerated repayment - comparison between data - Save data - Calculate the loan amount using a subsidiary calculation function: - from desired repayment amount - annual income [Settable entries] - Loan amount - Interest rate and type (Fixed, Fixed multi-step, Variable) - Loan term - Payment method (Principal equal, Interest equal) - Bonus payment - Accelerated repayment (Reduce the total term, Reduce the monthly payment) - Various cost (Fees, Taxes, Insurance etc) - Starting date - Starting age - Borrowing date [Notes about calculation] - 5 year rule, 125% rule Amount of monthly payment is revised once every 5 year when you setup variable interest rate (5 year rule). The maximum amount of payment after the adjustment is 1.25 times more than the original amount (125% rule). - Accelerated repayment with reducing total term for the bonus payment If you accelerate repayment by reducing the total term, the reduced term is every 6 months (if you select twice a year bonus payment) or 12 months (if you select once a year bonus payment). * iLoan Calc is an application that allows you to calculate various amount of a loan. Please note that the results on this application gives a guideline and does not necessarily correspond to the results of financial institutions.
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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.