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
QLCurrencyConverter
QL Currency Converter gives you a clean, focused way to convert currencies on iPhone without clutter
$0.99 · In-app purchases
PRICE
$0.99
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's included15 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 QLCurrencyConverter: 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
Implement real-time updates using a reliable API for currency rates.
Assumption to check: Users often find conversion rates outdated or inaccurate.
Validate with people who use this workflow before building.
Hypothesis 2
Integrate a wider range of currencies and allow user suggestions.
Assumption to check: Limited currency options make it less versatile.
Validate with people who use this workflow before building.
Hypothesis 3
Design a cleaner, more user-friendly interface with better guidance.
Assumption to check: User interface feels cluttered or unintuitive.
Validate with people who use this workflow before building.
Hypothesis 4
Add a feature to save and review past conversions.
Assumption to check: No historical conversion tracking available.
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
QL Currency Converter gives you a clean, focused way to convert currencies on iPhone without clutter. Enter an amount, choose your currencies, and get the latest available reference value with clear calculation and source details. Features: Convert between supported global currencies Refresh the latest available reference rates See the exact calculation behind each result View reference date, refresh status, and source details Pin frequent pairs for quick access Set a home pair for the route you use most Search currencies quickly in a simple iPhone-first interface Keep access to saved rates when live retrieval is unavailable QL Currency Converter is built for speed, clarity, and trust. Reference rate data is fetched from Frankfurter, and the app clearly shows whether the current value comes from a live refresh or saved data. No account required.ke
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
Redux
Axios
React Navigation
React Native Paper
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.
