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.
BA Financial Calculator Pro is a professional-grade app tailored for finance professionals, business analysts, CFA/FRM candidates, and business students
$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 BA Calc - Financial Calculator: 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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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 calculation types compared to more comprehensive financial apps
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of user feedback on calculations
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No way to share results
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No persistent history for calculations
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.
BA Financial Calculator Pro is a professional-grade app tailored for finance professionals, business analysts, CFA/FRM candidates, and business students. We have perfectly replicated all the functions, algorithms, and key sequences of the world-renowned classic BA II Plus financial calculator. No need to carry a physical calculator anymore—your phone is now your most powerful financial analysis engine. Core Features • Time Value of Money (TVM): Easily calculate Present Value (PV), Future Value (FV), Number of Periods (N), Interest Rate (I/Y), and Payment (PMT) for annuities, loans, leases, and savings. • Cash Flow Analysis: Supports inputs for dozens of uneven cash flows. Calculate Net Present Value (NPV) and Internal Rate of Return (IRR) with a single tap. • Amortization Schedules: Quickly generate loan amortization tables and allocate principal and interest. • Bond Calculations: Compute bond prices, Yield to Maturity (YTM), and modified duration. • Depreciation: Built-in Straight-Line (SL), Declining Balance, and other depreciation methods. • Statistical Analysis: 1-variable and 2-variable statistics with linear, exponential, and other regression models. • Breakeven & Profit Margin: Instantly determine breakeven points, profit margins, and markups to assist in business decisions. Product Highlights • Perfect Emulation: 1:1 exact interface layout with haptic feedback, providing a seamless transition from the physical device. • Extreme Precision: Strict financial-grade algorithms ensure flawless accuracy down to the exact decimal. • Auto-Save: Smart memory retains your previous inputs and settings even after closing the app. Who Is This For? • CFA (Chartered Financial Analyst) and FRM (Financial Risk Manager) candidates. • Professionals in banking, securities, real estate, and insurance. • CFOs, accountants, and corporate investment decision-makers. • Students and professors in accounting, finance, and economics.
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.