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
EUR/USD Exchange Rate Live
Now you don't even need to start the app to track EUR/USD rate and get notified on the EUR/USD moves
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
17 ratings · Top 30%
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's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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 EUR/USD Exchange Rate Live: 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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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
Enhance the historical data with more interactive charts and filters.
Assumption to check: Limited historical data visualization options
Validate with people who use this workflow before building.
Hypothesis 2
Implement customizable notifications for users to set alerts for specific exchange rates.
Assumption to check: No personalized alerts for rate changes
Validate with people who use this workflow before building.
Hypothesis 3
Focus on a more modern and visually appealing design with animations.
Assumption to check: Basic UI design lacking polish
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate tutorials or articles about currency trading and exchange.
Assumption to check: Lack of educational resources on currency exchange
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
Now you don't even need to start the app to track EUR/USD rate and get notified on the EUR/USD moves. Packed with features, this makes the best real time EUR/USD rate tracking system on the market. Welcome to the "EUR/USD Forex Watch". This is not just an app, it is entire rate tracking and notification system. Our app is backed by a powerful push notification server delivering user defined rate alerts to your home screen, real-time rates to the badge and rate information with the chart data directly to the widget. FEATURES THAT WORK WITHOUT EVEN RUNNING THE APP: ● Rate information and rate chart using widget technology ● Rate on the app badge trough push notifications ● Rate change alerts on your home screen trough push notifications FEATURES INSIDE THE APP: ● Real time rate information ● Historical chats ● Custom alert editor ● Market overview: commodities, currencies and stock indexes (in progress) ● Both orientations supported REQUIREMENTS: Supports all iOS Devices: iPhone, iPad and all iPod Touch devices!
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
Zustand
Victory Native
React Navigation
Axios
BUILD KIT DIFFICULTY
Advanced
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.
