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.
Take the guesswork out of managing your stock investments
$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 Stock Average Calculator Pro: 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 for complex calculations.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of user customization options.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No integration with stock market APIs for real-time data.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No user account management for data persistence.
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.
Take the guesswork out of managing your stock investments. Stock Average Calculator helps you calculate and track the average cost of your stock positions, whether you're averaging down, taking profits, or planning your next purchase. Designed for investors of all experience levels, the app makes it easy to manage multiple buy and sell transactions, instantly recalculate your average cost, and explore potential investment scenarios before making your next move. Key Features • Calculate your average cost across multiple buy and sell transactions • Track your current position, remaining shares, and average cost per share • Save unlimited calculations for quick access later • Search, rename, sort, and organize saved positions • Use What If scenarios to model future purchases before investing • Export calculations to Microsoft Excel (.xlsx) • Create and restore local backups using JSON files • Add notes to individual transactions • Clean, modern interface with Light, Dark, and Automatic appearance modes • Fast, private, and easy to use Your Privacy Matters Your investment data stays on your device. Stock Average Calculator does not require an account, does not collect personal information, and does not upload your calculations to external servers. Whether you're a long-term investor, swing trader, or simply keeping track of your portfolio, Stock Average Calculator gives you the tools you need to make more informed investment decisions.
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.