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
FX Vision
FX Vision is a simple, beautiful way to monitor foreign exchange rates
$2.99
PRICE
$2.99
No 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's included16 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.
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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.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
FX Vision is a simple, beautiful way to monitor foreign exchange rates. With a Stocks-app-style experience, keep an eye on the currency pairs that matter to you. ■ Features ・Watchlist Add pairs like USD/JPY or EUR/USD and see the current rate, day-over-day change, and a mini sparkline at a glance. ・Detail chart Tap a pair to view its history. Choose from 1 day, 1 week, 1 month, 6 months, 1 year, 2 years, 5 years, or 10 years — the change over the selected period is shown. Drag with two fingers to measure the change across any span. The 1-day and 1-week ranges show movement hour by hour. ・Home Screen widget Place your watched pairs on the Home Screen. The small size shows one pair; the medium size shows three, each with a sparkline. Choose the chart period (1 day to 1 year) from the widget's settings. ・Modern, dark-first design A refined dark interface built with the latest iOS 26 design. Gains in green, losses in red — instantly readable. ■ About the data Rates are provided by Frankfurter (European Central Bank reference rates) and ExchangeRate-API (the current rate, and intraday data for the 1-day and 1-week charts). Data is for information purposes only and may be delayed. The app does not offer trading or investment advice; make your own investment decisions. ■ Great for ・Anyone who wants a simple view of currency movements ・People who want a Stocks-like way to watch currencies ・Checking FX right from the Home Screen
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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
BUILD KIT DIFFICULTY
Intermediate
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.
