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.
App Overview
Trading Calculator Pro
Trading Calculator Pro is a fast, precision-first risk management app built to help traders size positions correctly, stay consistent, and protect capital.
$14.99 · In-app purchases
PRICE
$14.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Trading 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.
Preview ready. Verify your email to reveal and copy the full prompt.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Simplify the UI and provide tutorials.
Assumption to check: Users often find finance apps confusing and overwhelming.
Validate with people who use this workflow before building.
Hypothesis 2
Implement user preferences and customization.
Assumption to check: Lack of personalized features in finance apps.
Validate with people who use this workflow before building.
Hypothesis 3
Be transparent about pricing and features.
Assumption to check: Many finance apps have hidden fees or unclear pricing.
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate interactive charts and graphs.
Assumption to check: Users want better data visualization.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Trading Calculator Pro is a fast, precision-first risk management app built to help traders size positions correctly, stay consistent, and protect capital. Calculate lot size, dollar risk, and risk % across major markets including Forex, indices, metals, and crypto. Choose the calculation mode you prefer: • Enter your risk ($) + stop loss to get lot size • Enter your risk (%) + stop loss to get lot size • Enter your lot size + stop loss to get risk ($) and risk (%) • Enter your lot size + risk ($) to get the stop loss distance Stay disciplined with a Daily Target tracker, then log your trades in the built-in Journal. Track performance by week, month, or year, filter wins/losses, and review results in a calendar-style view. You can also plan setups with the RR Planner by entering Entry/SL/TP to instantly see Risk-Reward and direction. Key Features: • 4 calculation modes (Lot Size, Risk $, Risk %, or Stop Loss distance) • Daily Target tracker for consistent risk planning • RR Planner (Entry/SL/TP → RR + LONG/SHORT inference) • Trade Journal with week/month/year views and performance stats • Calendar view + filters (wins only, losses only, or all trades) • Clear All option with confirmation warning • Clean, fast, and intuitive interface built for accuracy Whether you day trade or swing trade, Trading Calculator Pro keeps your risk math correct and your execution consistent.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
React Navigation
Async Storage
React Native Paper
Axios
BUILD KIT DIFFICULTY
Starter
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.
